Data as of: DVSA MOT results to 2025
Lambretta 150LI vs Piaggio Vespa
The Lambretta 150LI passes its MOT first time more often than the Piaggio Vespa: 87.5% vs 80.7%, a 6.8-point lead.
MOT reliability, side by side
| Metric | Lambretta 150LI | Piaggio Vespa |
|---|---|---|
| First-time pass rate | 87.5% | 80.7% |
| Outright fail rate | 7.3% | 12.2% |
| Vs comparable bikes (age & mileage adjusted) | +4.6 pts | +5.9 pts |
| Engine size | 150cc | 124cc |
| Rank among all models | #1750 of 5428 | #3439 of 5428 |
| Median miles at test | 2,732 | 10,023 |
| MOT tests analysed | 806 | 287,482 |
| Most common failure | steering and suspension | 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
| Component | Lambretta 150LI | Piaggio Vespa |
|---|---|---|
| Lights & signalling | 2.5% | 6.4% |
| Brakes | 3.1% | 3.5% |
| Steering & suspension | 3.2% | 3.2% |
| Tyres & wheels | 0.9% | 3.8% |
| Structure & body | 0.5% | 1.4% |
| Fuel & exhaust | 0.1% | 1.3% |
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
| Test year | Lambretta 150LI | Piaggio Vespa |
|---|---|---|
| 2011 | 84.5% | 76.1% |
| 2012 | 81.4% | 76.2% |
| 2013 | 92.1% | 76.4% |
| 2014 | 87.3% | 76.6% |
| 2015 | 93.9% | 78.4% |
| 2016 | 87.7% | 79.2% |
| 2017 | 86.3% | 81.0% |
| 2018 | 91.9% | 81.5% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Lambretta 150LI | Piaggio Vespa |
|---|---|---|
| 0k-10k miles | 88.4% | 85.0% |
| 10k-20k miles | 86.0% | 77.0% |
| 20k-30k miles | 90.8% | 75.3% |
| 30k-40k miles | 83.7% | 75.4% |
| 40k-50k miles | 78.1% | 75.3% |
Bands with fewer than 30 tests for either bike are left out.
Lambretta 150LI vs Piaggio Vespa FAQ
Which is more reliable, the Lambretta 150LI or the Piaggio Vespa?
The Lambretta 150LI passes its MOT first time more often than the Piaggio Vespa: 87.5% vs 80.7%, a 6.8-point lead. Adjusted for age, mileage and test class, the Piaggio Vespa still comes out ahead: +4.6 points vs comparable bikes for the Lambretta 150LI, +5.9 for the Piaggio Vespa. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Lambretta 150LI fail its MOT on most?
Steering & suspension: 3.2% of Lambretta 150LI MOT tests failed on it, then brakes (3.1%).
What does the Piaggio Vespa fail its MOT on most?
Lights & signalling: 6.4% of Piaggio Vespa MOT tests failed on it, then tyres & wheels (3.8%).
Which holds up better at high mileage, the Lambretta 150LI or the Piaggio Vespa?
At 40k-50k miles the Lambretta 150LI passes first time more often: 78.1% for the Lambretta 150LI vs 75.3% for the Piaggio Vespa.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.