Royal Alloy GT 200 LC vs Lambretta LI150

The Lambretta LI150 passes its MOT first time more often than the Royal Alloy GT 200 LC: 88.8% vs 87.4%, a 1.4-point lead.

MOT reliability, side by side

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

Metric	Royal Alloy GT 200 LC	Lambretta LI150
First-time pass rate	87.4%	88.8%
Outright fail rate	7.0%	5.9%
Vs comparable bikes (age & mileage adjusted)	+6.7 pts	+6.4 pts
Engine size	181cc	150cc
Rank among all models	#1787 of 5428	#1332 of 5428
Median miles at test	1,841	2,944
MOT tests analysed	483	19,294
Most common failure	lamps and reflectors	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.

Pass rate by test year

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

Test year	Royal Alloy GT 200 LC	Lambretta LI150
2021	87.8%	94.3%
2022	84.9%	90.0%
2023	90.4%	90.8%
2024	86.9%	95.9%
2025	87.2%	97.1%

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

ROYAL ALLOY GT 200 LC 87.4% pass · 483 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.