What year Triumph Speed Four is most reliable?

Based on MOT first-test pass rates, the 2006 Triumph Speed Four has the highest pass rate at 86.3%, out of 294 vehicles tested.

What are the most common Triumph Speed Four MOT failures?

The most common Triumph Speed Four MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Triumph Speed Four — Reliability by Year

712 vehicles · MOT data 2003–2006 · first-test pass rates

This page shows MOT first-test pass rates for each year the Triumph Speed Four was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

2006

86.3% pass rate · 294 vehicles

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Lowest pass rate year

2004

84.6% pass rate · 189 vehicles

Year	Pass rate	Avg mileage	Vehicles
2006	86.3%	13,787 mi	294
2004	84.6%	14,608 mi	189
2003	85.0%	14,740 mi	229

Which year Triumph Speed Four is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests.

Tests range from an average of 13,787 miles (newest year) to 14,740 miles (oldest year). Older years naturally accumulate more tests at higher mileages — see the mileage-normalised breakdown →

Trying to decide which year to buy?

We've done the full analysis — which years to look for, which to avoid, and where to find the best value for reliability on a Triumph Speed Four.

See the buying guide →

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