Ford Sierra build years & generations
The Ford Sierra spans several build years and named generations (1982-1993). Match a build year to its generation, then see how each group of build years does at its MOT.
Which year is which
Build years & generations, side by side
Find the build years you're looking at and see which generation they are. You'll also see which group of build years the MOT figures come from.
Built 1982-1986
- Generation
- Mk1
- Figures from
- cars built before 2005
Counted together with Mk1 and Mk2 cars built in the same years.
Built 1987-1993
- Generation
- Mk2
- Figures from
- cars built before 2005
Counted together with Mk1 and Mk2 cars built in the same years.
“Figures from” is the group of build years behind each card's MOT figures. Years where one generation gave way to the next can sit in a wider group until there's enough history to split them.
By build-year group
How each group of build years performs
Each card shows MOT results for one group of Ford Sierra build years. “Age” means the car's age on the day of its MOT, not its build year. “25+” groups every test on cars aged 25 or older.
BuiltBefore 2005
A mix of Mk1 and Mk2
These build years include both Mk1 and Mk2 cars, so the figures are less exact than for a single generation.
Fail rate at 25+ years old
11.5%
UK average for cars this age: about 1 in 4 (23%)
Ages with data
25 years old or more
MOT tests counted
3,022
Chart shows
Age at the MOT
Not the build year
Before 2005
A mix of Mk1 and Mk2
These build years include both Mk1 and Mk2 cars, so the figures are less exact than for a single generation.
Fail rate at 25+ years old
11.5%
UK average for cars this age: about 1 in 4 (23%)
Ages with data
25 years old or more
MOT tests counted
3,022
Chart shows
Age at the MOT
Not the build year
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Highest fail rate at 25+ years old.