Triumph 1500 vs Triumph Rocket iii roadster: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph 1500
74%
MOT pass rate · 37,142 vehicles
Triumph Rocket iii roadster
100%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph Rocket iii roadster (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph Rocket iii roadster |
|---|---|---|
| MOT pass rate | 74% | 100% ✓ |
| MOT failure rate | 26% | 0% ✓ |
| Faults & advisories per test | 2.3 | 0.3 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | 21,390 mi |
| Sample size (vehicles) | 37,142 | 2 |
Most common faults
Triumph 1500
- Parking brake: efficiency below requirements (3.7.B.7)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Rear wheel bearing has slight play (2.6.2)
- Offside Rear wheel bearing has slight play (2.6.2)
- Brakes imbalanced across an axle (3.7.B.5b)
- Oil leak
Triumph Rocket iii roadster
- Exhaust noisy (7.1.2)
- Front Roller brake test indicates slight fluctuation of brake effort 20kgf (3.3.A1d)
- Front Tyre worn close to the legal limit 1mm (4.1.3(ii))
- rear tyre worn down to the legal limit
- Nearside Front R clip missing front caliper
- Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph Rocket iii roadster (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph Rocket iii roadster report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.