Triumph Speed Four Reliability, MOT Pass Rate & Common Faults
Free Triumph Speed Four car check
Is the Triumph Speed Four reliable? We analysed 10,305 real MOT tests across 819 vehicles to find out.
Got a specific Triumph Speed Four? Enter the reg for a free check:
The Triumph Speed Four is above average for reliability based on real UK MOT data. Common problems include tyre tread depth is below minimum requirements of 1.0mm, stop lamp does not illuminate immediately a brake applies and brake pad(s) less than 1.5 mm thick. Here's everything you need to know before buying a used Triumph Speed Four.
Triumph Speed Four Number Plates
Number plates registered to a Triumph Speed Four. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Triumph Speed Four MOT Pass Rate by Year
How likely is a Triumph Speed Four to pass its MOT? Here's the pass rate for each registration year, newest first.
Triumph Speed Four Problems — What Goes Wrong?
The most common reasons a Triumph Speed Four fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Triumph Speed Four Mileage — What's Normal?
How many miles does a typical Triumph Speed Four owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Triumph Speed Four MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Triumph Speed Four year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2007 | 138 | 87.0% | 6,462 | 10,811 | 19,893 |
| 2006 | 3,405 | 84.9% | 8,952 | 14,188 | 22,680 |
| 2005 | 916 | 83.7% | 8,879 | 15,108 | 21,949 |
| 2004 | 2,385 | 83.5% | 8,081 | 14,662 | 22,154 |
| 2003 | 2,831 | 83.7% | 9,403 | 15,153 | 23,842 |
| 2002 | 572 | 83.6% | 11,709 | 18,476 | 26,291 |
How Long Does a Triumph Speed Four Last?
Based on 819 Triumph Speed Four vehicles on UK roads.
Triumph Speed Four Mileage Distribution
Total mileage recorded across all Triumph Speed Four MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Triumph Speed Four
Based on MOT pass rates across all registration years with sufficient test data.
87.0% MOT pass rate from 138 tests
83.5% MOT pass rate from 2,385 tests
The best year to buy a used Triumph Speed Four is 2007, which has the highest MOT pass rate at 87.0% across 138 tests. The 2004 model year has the lowest pass rate at 83.5% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Triumph Speed Four Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Triumph Speed Four THIS CAR | 84.1% | 10,305 | 14,871 mi | 24 yrs |
| Triumph Bonneville | 90.1% | 235,206 | 7,823 mi | 53 yrs |
| Triumph Tiger | 90.6% | 196,853 | 17,026 mi | 32 yrs |
| Triumph Sprint | 87.3% | 158,613 | 21,242 mi | 33 yrs |
| Toyota Yaris Cross Icon HEV Auto | 92.1% | 6,797 | 24,530 mi | — yrs |
Compared to the Triumph Bonneville (90.1% pass rate) and the Triumph Tiger (90.6% pass rate), the Triumph Speed Four trails behind on MOT reliability.
Found a Triumph Speed Four you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Triumph Speed FourShould you buy a used Triumph Speed Four?
The Triumph Speed Four has an overall MOT pass rate of 84.1% across 10,305 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Triumph Speed Four are tyre tread depth is below minimum requirements of 1.0mm (154 recorded failures), stop lamp does not illuminate immediately a brake applies (83), and brake pad(s) less than 1.5 mm thick (75). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Triumph Speed Four owner drives around 831 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Triumph Speed Four models stay on UK roads for around 24 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.