Ducati ST4 vs Triumph Sprint

The Triumph Sprint passes its MOT first time more often than the Ducati ST4: 85.6% vs 84.0%, a 1.6-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Ducati ST4	Triumph Sprint
First-time pass rate	84.0%	85.6%
Outright fail rate	9.5%	8.8%
Vs comparable bikes (age & mileage adjusted)	-0.1 pts	+1.8 pts
Engine size	916cc	955cc
Rank among all models	#2748 of 5428	#2333 of 5428
Median miles at test	18,179	20,615
MOT tests analysed	4,934	132,827
Most common failure	lighting and signalling	brakes

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Ducati ST4	Triumph Sprint
Lights & signalling	5.0%	2.8%
Brakes	2.4%	3.7%
Steering & suspension	3.4%	2.5%
Tyres & wheels	1.6%	2.2%
Drive system	0.7%	0.4%
Structure & body	0.4%	0.6%
Fuel & exhaust	0.3%	0.2%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Ducati ST4	Triumph Sprint
2018	83.2%	86.2%
2019	79.9%	86.1%
2020	87.7%	86.4%
2021	85.0%	86.7%
2022	86.5%	85.9%
2023	83.2%	86.4%
2024	87.2%	86.8%
2025	86.4%	86.8%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Ducati ST4	Triumph Sprint
0k-10k miles	88.6%	90.9%
10k-20k miles	84.6%	87.5%
20k-30k miles	82.8%	85.0%
30k-40k miles	80.1%	82.1%
40k-50k miles	76.2%	80.3%
50k-60k miles	83.6%	79.3%

Bands with fewer than 30 tests for either bike are left out.

Ducati ST4 vs Triumph Sprint FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Ducati ST4 or the Triumph Sprint?

The Triumph Sprint passes its MOT first time more often than the Ducati ST4: 85.6% vs 84.0%, a 1.6-point lead. Adjusted for age, mileage and test class, the Triumph Sprint still comes out ahead: -0.1 points vs comparable bikes for the Ducati ST4, +1.8 for the Triumph Sprint. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Ducati ST4 fail its MOT on most?

Lights & signalling: 5.0% of Ducati ST4 MOT tests failed on it, then steering & suspension (3.4%).

What does the Triumph Sprint fail its MOT on most?

Brakes: 3.7% of Triumph Sprint MOT tests failed on it, then lights & signalling (2.8%).

Which holds up better at high mileage, the Ducati ST4 or the Triumph Sprint?

At 50k-60k miles the Ducati ST4 passes first time more often: 83.6% for the Ducati ST4 vs 79.3% for the Triumph Sprint.

DUCATI ST4 84.0% pass · 4,934 tests TRIUMPH SPRINT 85.6% pass · 133k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.