Vespa (douglas) PX200 vs Lambretta LI150

The Lambretta LI150 passes its MOT first time more often than the Vespa (douglas) PX200: 88.8% vs 85.5%, a 3.3-point lead.

MOT reliability, side by side

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

Metric	Vespa (douglas) PX200	Lambretta LI150
First-time pass rate	85.5%	88.8%
Outright fail rate	8.8%	5.9%
Vs comparable bikes (age & mileage adjusted)	+7.5 pts	+6.4 pts
Engine size	198cc	150cc
Rank among all models	#2363 of 5428	#1332 of 5428
Median miles at test	17,281	2,944
MOT tests analysed	880	19,294
Most common failure	lighting and signalling	lighting and signalling

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	Vespa (douglas) PX200	Lambretta LI150
Lights & signalling	5.3%	3.3%
Brakes	2.3%	2.1%
Steering & suspension	2.5%	1.8%
Tyres & wheels	0.8%	0.9%
Fuel & exhaust	0.2%	0.3%
Structure & body	0.1%	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	Vespa (douglas) PX200	Lambretta LI150
2014	88.1%	89.5%
2015	83.6%	90.1%
2016	79.5%	91.4%
2017	89.7%	90.6%
2018	91.7%	90.2%
2019	84.8%	92.6%
2021	76.7%	94.3%
2023	81.8%	90.8%

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	Vespa (douglas) PX200	Lambretta LI150
0k-10k miles	84.8%	88.8%
10k-20k miles	82.2%	89.8%
20k-30k miles	87.1%	87.0%
30k-40k miles	89.4%	88.2%
40k-50k miles	91.8%	88.8%

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

Vespa (douglas) PX200 vs Lambretta LI150 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Vespa (douglas) PX200 or the Lambretta LI150?

The Lambretta LI150 passes its MOT first time more often than the Vespa (douglas) PX200: 88.8% vs 85.5%, a 3.3-point lead. Adjusted for age, mileage and test class, the Vespa (douglas) PX200 still comes out ahead: +7.5 points vs comparable bikes for the Vespa (douglas) PX200, +6.4 for the Lambretta LI150. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Vespa (douglas) PX200 fail its MOT on most?

Lights & signalling: 5.3% of Vespa (douglas) PX200 MOT tests failed on it, then steering & suspension (2.5%).

What does the Lambretta LI150 fail its MOT on most?

Lights & signalling: 3.3% of Lambretta LI150 MOT tests failed on it, then brakes (2.1%).

Which holds up better at high mileage, the Vespa (douglas) PX200 or the Lambretta LI150?

At 40k-50k miles the Vespa (douglas) PX200 passes first time more often: 91.8% for the Vespa (douglas) PX200 vs 88.8% for the Lambretta LI150.

VESPA (DOUGLAS) PX200 85.5% pass · 880 tests LAMBRETTA LI150 88.8% pass · 19.3k tests

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