Ranked #279 car in the UK · Sports · 9 units sold last year
Porsche 718 Cayman
The Porsche 718 Cayman (2018 on) is, for many, the purest-driving Porsche - a mid-engined coupe with near-perfect balance and steering that shames cars costing far more. Turbo flat-fours give strong pace; the later flat-six GTS 4.0 and GT4 are the ones enthusiasts revere. Snug and firm, but as a focused two-seat driver's car for sensible money, little touches it.
How these figures are sourced — the valuation is anchored to a researched used-market price for this model (AutoTrader median, 2023 at 30k miles). Reliability, mileage and variant data are real DVSA MOT records. Dimensions, tyre sizes and costs, servicing figures and the insurance group are segment-level estimates rather than sourced per car, and are being replaced model by model.
- Body
- Sports
- Years
- 2018–2026
- Fuel
- Petrol
- Economy
- 35 mpg
- Insurance
- Group 45
combined
The short version
Forecourt score
Value 88 · Reliability 90 · Insurance 6 · catalogue percentiles
The Porsche 718 Cayman holds its value well and is dearer to run than most. Its MOT-based reliability is excellent — an MOT score of 91/100, ahead of 95% of the cars we track. On three-year value retention it ranks better than 88% of models.
The Forecourt score blends how this car ranks against the catalogue on value retention, reliability and insurance cost (weighted 40/40/20) — the from-new ownership picture. Higher is better; running cost is not yet folded in.
Pick your version
Estimates are tuned to the version you choose.
Fuel
Petrol · 1988cc
Power
300 ps
Drivetrain
RWD
Cam drive
Chain
Quoted MPG
35 mpg
The volume 718 Cayman - 2.0 flat-four turbo, 300 PS. Manual or PDK. Chain-driven; the coupe-bodied Boxster.
Tell us about the one you're looking at
Tidy and well looked-after for its age — the typical car.
Remembered as you browse other cars.
Optional — fills in the exact year and ULEZ status for your specific car. The registration isn’t stored.
Estimated market value
How we got this number — click for the breakdown, or to challenge it.£39,250
Range £32,500 – £46,550
medium confidence
Fair value — depreciation is moderating.
At 16,170 miles it’s about the ~18,852 typical for a 3-year-old.
Seen one for sale?
A data-led guide from the depreciation curve, UK parc trend and reliability — not financial advice.
The depreciation curve
How a 2023-registration Porsche 718 Cayman loses value over time.
What it costs to own
Based on the 2023 car with 16,170 miles you entered above — worth about £39,250 today — here is the cost of owning it for the next 5 years, at roughly 5,390 miles a year.
5-year total
£32,402
Per year
£6,480
All-in per mile
£1.20
Fuel per mile
22.5p
Best age to buy — around 5 years
A 5-year-old example loses roughly £4,100 a year — 62% less than the £10,700 a one-year-old sheds. The steepest drop is behind it.
Uses current UK pump and home-charging prices (DESNZ weekly), typical-driver insurance and manufacturer service intervals. "Fuel per mile" is just the energy input — so an EV at ~9p and a diesel at ~22p make running-cost comparison direct. A guide; your own costs will vary.
How it compares
Where this car ranks against the 340 vehicles in our index — higher is better.
Percentile rank across our full index. A measure is shown only where the data spreads meaningfully across the index.
Estimated insurance
Group 45 of 50 (high — premium bracket) · Comprehensive · 3 years NCB
Indicative annual comprehensive premiums for this car, by driver age band and risk profile. Pick the combination closest to your circumstances.
Estimated annual premium · typical, age 33-39
£1,275/ year
Roughly £106 per month
Typical
Average UK driver — 3 years NCB, average postcode, no recent claims.| Age band | Lower risk | Typical | Higher risk |
|---|---|---|---|
| Age 17-25 | £2,906 | £3,632 | £4,722 |
| Age 26-32 | £1,517 | £1,784 | £2,177 |
| Age 33-39Selected | £1,122 | £1,275 | £1,504 |
| Age 40-49 | £952 | £1,058 | £1,227 |
| Age 50+ | £849 | £943 | £1,113 |
How we estimate this
Indicative annual comprehensive premium estimates. The 'Typical' figure represents an average UK driver in each age band; Lower and Higher risk show the realistic spread driven by factors UK insurers legitimately price on (postcode, occupation, claims history, NCB, voluntary excess, modifications). Based on 10,000 miles/yr, £250 voluntary excess, and the no-claims bonus selected above. Always get individual quotes before buying.
Expected annual costs
Adjust the annual mileage to match how you'll actually use the car. Insurance is what you selected above (age 33-39, typical risk, 3 yrs NCB).
Routine service
£290
Annual main-dealer service
Major service
£280
Every 2 years, annualised
Road tax
£200
Standard rate, post year-one
Fuel
£1,214
35 mpg, £1.73/L
Insurance
£1,275
Age 33-39, group 45
Clean-air zones
⚠ Depends on variantBased on London ULEZ standards — Birmingham, Bath, Bristol, Sheffield, Glasgow and other UK clean-air zones generally follow the same rules.
Excludes depreciation and unscheduled repairs (see next section).
Unexpected costs
What out-of-warranty repairs typically run, by mileage band. Your selected mileage is highlighted.
0-30k miles
£120
per year · low risk
30-60k miles
£360
per year · low risk
60-100k miles
£780
per year · medium risk
100k+ miles
£1,350
per year · high risk
Tyres
235/40 R18 · 245/35 R19
What a full set of four will cost you (including fit and balance), and which brand each tier of buyer should pick. A typical set lasts about 15,000 miles.
Budget
£400
set of 4, fitted · £85 per tyre
Mid-range
£580
set of 4, fitted · £130 per tyre
Premium
£840
set of 4, fitted · £195 per tyre
What to fit
Optional extras worth paying for
Factory options ranked by how much of their original cost they recover at resale. Anything above 70% return tends to make money back; below 40% is paying for your own enjoyment.
| Option | New cost | Added used value | Return |
|---|---|---|---|
Tow bar (factory-fit) Niche, but the buyers who want one will pay for it. | £650 | £450 | 69% |
Parking sensors & reversing camera Near-expected now — its absence costs more than its presence returns. | £500 | £300 | 60% |
Heated seats / cold-weather pack | £450 | £200 | 44% |
Adaptive / matrix LED headlights | £900 | £400 | 44% |
Metallic or premium paint Almost universal — an unusual colour is the bigger resale risk. | £600 | £200 | 33% |
Panoramic / opening roof | £1,100 | £350 | 32% |
Advanced driver-assistance pack | £1,500 | £450 | 30% |
Larger alloy wheels | £700 | £200 | 29% |
Premium sound system | £800 | £200 | 25% |
What fails at MOT
Recorded in DVSA MOT test data for this model, not owner reports. Ordered against 16,170 miles.
Watch now
Failure typically happens around your current mileage.
Upcoming
Typically happens at a higher mileage than yours.
Already due
Past its usual failure mileage. Either already fixed, or about to.
Lighting & signallingUpcoming
Recorded in 6.0% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
Tyres & wheelsUpcoming
Recorded in 3.6% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
SuspensionUpcoming
Recorded in 5.9% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
BrakesUpcoming
Recorded in 5.3% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
EmissionsUpcoming
Recorded in 3.6% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
Driver's viewUpcoming
Recorded in 1.2% of MOT tests over 100k miles — from 185,425 DVSA MOT tests analysed.
"Parts low/medium/high" indicates how easy the replacement part is to source — discontinued or specialist parts mean longer workshop time and bigger bills.
MOT outlook
How this model fares at its MOT as it ages — from 189,163 real DVSA test records.
MOT pass rate by age
A 3-year-old 718 Cayman passes its MOT 91.9% of the time; by 21 years that has slipped to 85.8%. The y-axis is zoomed to this model’s range so the trend is readable.
Longevity
From 1,434 vehicles registered in 2018.
Survival by registration year
Each point is one registration cohort. Older cars on the left, newer on the right. A flatter line means the model holds up over time; a steep drop means cohorts disappear from UK roads faster.
What fails at the first MOT
The defect categories a 718 Cayman registered 2018–2023 fails on at its first MOT, from 4,227 first tests. Every car here is the same age and the same generation, so these are the faults that show up first - not the wear a high-mileage older example collects.
- Tyres & wheels3.2%
- Driver's view0.5%
- Identification & other0.4%
- Lighting & signalling0.3%
- Suspension0.1%
- Emissions0.1%
Share of first MOT tests recording at least one defect in that category. DVSA test-item categories, not parts: “Driver’s view” covers mirrors, wipers and glass.
Typical mileage by age
The average odometer reading for a 718 Cayman at MOT, by age — measured from the same DVSA records, not assumed. A useful yardstick for whether a given car has done more or fewer miles than its age suggests.
- 3 yr18,852
- 4 yr23,734
- 5 yr28,613
- 6 yr33,293
- 7 yr38,177
- 8 yr42,429
- 9 yr47,137
- 10 yr51,414
- 11 yr55,809
- 12 yr60,726
- 13 yr64,938
- 14 yr67,906
Mean recorded mileage at MOT by vehicle age, from DVSA test records. Ages below three are not shown: the first MOT is due at three years, so the few cars tested earlier are a self-selected minority rather than a representative sample. Ages with at least 10 tests shown.
Reliability
Excellent
First-MOT pass rate and defect rate for cars registered 2018 onward (4,227 first tests), with cohort survival — high confidence.
MOT outlook · age 5 years
95th percentile — Among the best in the catalogue
Based on 17,138 MOT tests · ranked against 248 catalogue models with comparable data
Where this car sits in the catalogue
Pass-rate distribution across 248 catalogue models
Things owners say
- 01The flat-four turbos are quick and the value buy; the 4.0 flat-six GTS/GT4 are the cars to covet.
- 02Mid-engined balance makes it arguably better-handling than a base 911 - the driving experience is the draw.
- 03Two seats and a modest pair of boots - practical enough for weekends, not for family duty.
Safety recalls
Manufacturers occasionally issue safety recalls to fix a fault free of charge. You can check whether the Porsche 718 Cayman, or your exact vehicle, has any outstanding recalls on the official DVSA service.
Check on GOV.UKOpens the Driver & Vehicle Standards Agency recall checker. Choose the make, model and year of manufacture — no registration needed.
Theft risk
A general indicator from UK 2025 theft data and this car’s characteristics — not a prediction for any one vehicle.
Whole-car theft
Higher
Higher-value cars like this are relay-theft targets — keyless entry can be exploited from the driveway in under a minute.
Parts theft
Around average
Parts-theft risk is around average — catalytic-converter theft is the main thing to be aware of on any petrol or diesel car.
Worth doing
- Keep keys in a Faraday pouch and away from the front door to block relay attacks.
- A visible steering lock is a cheap, strong deterrent on a frequently-targeted car.
Clean-air zones
Whether driving a Porsche 718 Cayman into a UK clean-air zone will cost you anything. Rules use the same Euro standard across most zones — petrol from 2006 and diesel from 2015 onwards are exempt; pure electric is always exempt.
Charging zones for cars
| City | Area | Daily charge | Likely outcome |
|---|---|---|---|
| London | All of Greater London (within the M25) | £12.50 | Likely exempt Petrol from 2006 meets Euro 4. |
| Birmingham | Inside the A4540 Middleway | £8.00 | Likely exempt Petrol from 2006 meets Euro 4. |
| Bristol | City centre and part of the Portway | £9.00 | Likely exempt Petrol from 2006 meets Euro 4. |
| Glasgow | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Edinburgh | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Aberdeen | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Dundee | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
Zones that don't charge private cars
- Bath — City centre (Private cars and motorbikes are not charged).
- Bradford — Outer ring road and the Aire Valley (Private cars are not charged).
- Sheffield — Inside the A61 inner ring road (Private cars are not charged).
- Newcastle & Gateshead — City centres and the Tyne, Swing, High Level and Redheugh bridges (Private cars are not charged).
- Portsmouth — Part of the city centre (Applies to taxis, PHVs, buses, coaches and HGVs only).
Model-level guidance only. To check a specific registration, use the official gov.uk clean-air zone checker. Zone charges and boundaries are set by local councils and change over time.
Servicing & the dealer network
How well-supported Porsche is across the UK — a practical read on how easy servicing, parts and warranty work will be to find.
Franchised UK dealers
~45
Limited network
Performance premium
Network size relative to the UK's largest (Porsche is 1% of all franchised outlets)
A limited network — you may need to travel for main-dealer servicing, though independent specialists can often help.
For context, the UK has roughly 4,500 franchised car-dealer outlets in total, plus about 15,500 independent garages.
Approximate figures, curated from public UK industry sources (NFDA, Car Dealer Magazine). Franchised networks shrink year on year — these indicate network size, not an exact count.
Dimensions & weight
These are segment estimates, not manufacturer figures. 296 of 325 catalogued cars share one of 14 identical dimension sets, so they describe a class rather than this particular car. Sourced figures replace them model by model.
Length
4,400 mm
Width
1,850 mm
Height
1,300 mm
Kerb weight
1,500 kg
Boot
280–320 L
Fuel tank
48 L
How many are still out there
How the UK Porsche 718 Cayman fleet splits: taxed and on the road, parked off the road on a SORN, and gone from the register where that figure is available.
Total ever registered
11,130
Currently taxed & on road
8,584
77% of all registered
SORN (off road)
2,234
20% of all registered
Scrapped or exported
312
UK fleet trend — 2014 to 2025
-2% vs 2024Source: DfT VEH0124 vehicle licensing statistics (year-end 2025) · Updated 1 Oct 2026
Similar cars
Other sports models worth looking at
Same underpinnings
Built on the Porsche 982 platform
Mid-engine sports-car platform shared between 718 Boxster and 718 Cayman. Different badges, often substantially different residuals, but broadly the same mechanicals and repair cost profile.
Porsche 982 platform · Porsche
Common questions
Porsche 718 Cayman, answered from the data
- Is the Porsche 718 Cayman reliable?
- The Porsche 718 Cayman scores 91/100 on Forecourt's MOT-based reliability measure, ahead of 95% of the cars we track. That score uses first-MOT pass rate and defect rate for cars registered 2018 onward (4,227 first tests), with cohort survival — high confidence.
- How much does a used Porsche 718 Cayman cost?
- A 2023 Porsche 718 Cayman with around 16,170 miles is worth roughly £39,250 today (typical range £34,300–£44,250). Dealer forecourt prices sit higher and part-exchange offers lower; newer or lower-mileage examples cost more.
- How quickly does the Porsche 718 Cayman depreciate?
- A new Porsche 718 Cayman typically loses about 30% of its value over the first three years, then depreciates more slowly. Buying at three to five years old avoids the steepest part of the curve.
- What insurance group is the Porsche 718 Cayman?
- The Porsche 718 Cayman sits in insurance group 45 of 50 — the more expensive end of the scale. Exact premiums depend on the trim (some versions sit a few groups higher or lower), your age, postcode and no-claims history.
- What goes wrong on a used Porsche 718 Cayman?
- The parts most often recorded at MOT on the Porsche 718 Cayman are: lighting & signalling (typically around over 100k miles, £15-£120 to put right); tyres & wheels (typically around over 100k miles, £80-£500 to put right); suspension (typically around over 100k miles, £150-£450 to put right). A full service history and a recent MOT with no advisories are the best protection.
- What does the Porsche 718 Cayman cost to run?
- Expect around 35 mpg combined on the 718 Cayman 2.0, £200 a year in road tax, about £290 for a standard annual service. The full cost-of-ownership table above breaks this down per year and per mile for the exact year and mileage you choose.
- Is the Porsche 718 Cayman ULEZ compliant?
- Whether a Porsche 718 Cayman is ULEZ compliant depends on its engine and registration date: petrol from 2006 and diesel from September 2015 generally qualify, and electric versions are always exempt.
- How many Porsche 718 Caymans are on UK roads?
- About 8,584 Porsche 718 Caymans are currently taxed and on the road in the UK, from DfT vehicle-licensing data.
Answers are generated from this car's Forecourt data — DVSA MOT records, DfT licensing statistics and our valuation model — and update with the weekly data refresh.