Triumph 1500 vs Triumph Speed triple 9551: 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 Speed triple 9551
94%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph Speed triple 9551 (94%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph Speed triple 9551 |
|---|---|---|
| MOT pass rate | 74% | 94% ✓ |
| MOT failure rate | 26% | 6% ✓ |
| Faults & advisories per test | 2.3 | 0.6 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | 52,327 mi |
| Sample size (vehicles) | 37,142 | 1 |
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 Speed triple 9551
- Rear Tyre worn close to the legal limit (4.1.3(ii))
- Steering movement slightly stiff (2.2.1a)
- Rear Brake pad(s) less than 1.5 mm thick (3.2.A1f(i))
- Rear wheel bearings have slight free play (2.4.A.2c)
- Steering headbearing has slight free play (2.2.2)
- Nearside Front Brake pad(s) close to minimum limit (3.2.A1f(i))
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph Speed triple 9551 (94%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph Speed triple 9551 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.