Riley 1.5 Litre Reliability, MOT Pass Rate & Common Faults
Free Riley 1.5 Litre car check
Is the Riley 1.5 Litre reliable? We analysed 1,865 real MOT tests across 303 vehicles to find out.
Got a specific Riley 1.5 Litre? Enter the reg for a free check:
The Riley 1.5 Litre is above average for reliability based on real UK MOT data. Common problems include brake binding, brakes imbalanced across an axle and parking brake: efficiency below requirements. Here's everything you need to know before buying a used Riley 1.5 Litre.
Riley 1.5 Litre Number Plates
Number plates registered to a Riley 1.5 Litre. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Riley 1.5 Litre MOT Pass Rate by Year
How likely is a Riley 1.5 Litre to pass its MOT? Here's the pass rate for each registration year, newest first.
Riley 1.5 Litre Problems — What Goes Wrong?
The most common reasons a Riley 1.5 Litre fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Riley 1.5 Litre Mileage — What's Normal?
How many miles does a typical Riley 1.5 Litre owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Riley 1.5 Litre MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Riley 1.5 Litre year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 1955 | 161 | 85.1% | 44,660 | 62,301 | 77,637 |
| 1954 | 563 | 80.8% | 25,864 | 40,282 | 68,737 |
| 1953 | 256 | 85.5% | 9,772 | 39,474 | 70,382 |
| 1952 | 156 | 85.3% | 13,113 | 47,243 | 75,564 |
| 1951 | 137 | 92.0% | 19,588 | 32,684 | 64,247 |
| 1950 | 82 | 86.6% | 23,980 | 56,616 | 62,864 |
| 1949 | 62 | 83.9% | 24,379 | 27,696 | 40,116 |
| 1947 | 91 | 86.8% | 27,054 | 34,568 | 52,390 |
How Long Does a Riley 1.5 Litre Last?
Based on 303 Riley 1.5 Litre vehicles on UK roads.
Riley 1.5 Litre Mileage Distribution
Total mileage recorded across all Riley 1.5 Litre MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Riley 1.5 Litre
Based on MOT pass rates across all registration years with sufficient test data.
92.0% MOT pass rate from 137 tests
80.8% MOT pass rate from 563 tests
The best year to buy a used Riley 1.5 Litre is 1951, which has the highest MOT pass rate at 92.0% across 137 tests. The 1954 model year has the lowest pass rate at 80.8% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Riley 1.5 Litre Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Riley 1.5 Litre THIS CAR | 85.4% | 1,865 | 41,694 mi | 79 yrs |
| Riley Elf | 76.9% | 5,039 | 51,475 mi | 63 yrs |
| Riley 1.5 | 82% | 2,111 | 52,187 mi | 73 yrs |
| Riley 2.5 Litre | 87.7% | 789 | 40,583 mi | 77 yrs |
| Dacia Duster Journey Tce 4X2 | 91.6% | 966 | 22,264 mi | — yrs |
Compared to the Riley Elf (76.9% pass rate) and the Riley 1.5 (82.0% pass rate), the Riley 1.5 Litre outperforms both on MOT reliability.
Found a Riley 1.5 Litre you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Riley 1.5 LitreShould you buy a used Riley 1.5 Litre?
The Riley 1.5 Litre has an overall MOT pass rate of 85.4% across 1,865 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Riley 1.5 Litre are brake binding (55 recorded failures), brakes imbalanced across an axle (44), and parking brake: efficiency below requirements (36). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Riley 1.5 Litre owner drives around 346 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Riley 1.5 Litre models stay on UK roads for around 79 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.