Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Vespa (douglas) SS180 vs Lambretta LI150
The Vespa (douglas) SS180 passes its MOT first time more often than the Lambretta LI150: 92.7% vs 88.8%, a 3.9-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Vespa (douglas) SS180 | Lambretta LI150 |
|---|---|---|
| First-time pass rate | 92.7% | 88.8% |
| Outright fail rate | 3.1% | 5.9% |
| Engine size | 180cc | 150cc |
| Rank among all models | #344 of 5428 | #1332 of 5428 |
| Median miles at test | 19,488 | 2,944 |
| MOT tests analysed | 286 | 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.
Pass rate by mileage
first-time MOT pass rate by miles on the clock at test
| Mileage | Vespa (douglas) SS180 | Lambretta LI150 |
|---|---|---|
| 0k-10k miles | 90.5% | 88.8% |
| 10k-20k miles | 92.7% | 89.8% |
| 20k-30k miles | 98.1% | 87.0% |
| 30k-40k miles | 90.0% | 88.2% |
Bands with fewer than 30 tests for either bike are left out.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.