Fuel consumption: 4 of 4 variants rated.
Alfa Romeo 90 2.5 QO tops the Alfa Romeo 90 ranking by Fuel consumption, at 9.6 l/100km (29.4 mpg UK · 24.5 mpg US).
| # | Variant | Year | Body | Fuel | Fuel consumption |
|---|---|---|---|---|---|
| 1 | Alfa Romeo 90 2.5 QO | 1984 | Sedan | Petrol | 9.6 l/100km (29.4 mpg UK · 24.5 mpg US) |
| 2 | Alfa Romeo 90 2.0 | 1984 | Sedan | Petrol | 9.2 l/100km (30.7 mpg UK · 25.6 mpg US) |
| 3 | Alfa Romeo 90 2.0 Motronic | 1984 | Sedan | Petrol | 7.7 l/100km (36.7 mpg UK · 30.5 mpg US) |
| 4 | Alfa Romeo 90 2.4 Turbo D | 1984 | Sedan | Diesel | 7.6 l/100km (37.2 mpg UK · 30.9 mpg US) |