Triumph 1500 vs Triumph Tr4 sports: 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 Tr4 sports
81%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph Tr4 sports (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph Tr4 sports |
|---|---|---|
| MOT pass rate | 74% | 81% ✓ |
| MOT failure rate | 26% | 19% ✓ |
| Faults & advisories per test | 2.3 | 1.1 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | 66,479 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 Tr4 sports
- Steering column top bearing slightly worn (2.1.2c)
- bolts on nearside rear shock absorber & steering column not protruding through nylon of locking nuts but tight so not insecure.
- oil leak at nearside rear brake back plate
- some play in parking brake compensator
- Parking brake: parking brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.7)
- Nearside Headlamp aim too low (1.8)
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph Tr4 sports (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph Tr4 sports 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.