| Type | 2-door, 4-passenger compact sedan |
| 2-door, 4-passenger compact convertible | |
| Layout | Front engine/rear-wheel drive |
| Engine | 3.0-litre I6, DOHC, 24 valves |
| 3.0-litre I6, DOHC, 24 valves, | |
| turbocharged | |
| Horsepower | 230 @ 6500 rpm |
| 300 @ 5800 rpm | |
| Torque (lb-ft) | 200 @ 2750 rpm |
| 300 @ 1400 rpm | |
| Transmission | 6-speed manual (6-speed auto optional) |
| Tires 128i | P205/50R17 all-season run-flat |
| Tires 135i | P215/40R18 performance run-flat (front) |
| P245/35R18 performance run-flat (rear) | |
| Curb weight 128i Coupe | 1475 kg (3252 lbs)(M/T) |
| 1510 kg (3329 lbs)(A/T) | |
| Curb weight 128i Cabriolet | 1585 kg (3494 lbs)(M/T) |
| 1620 kg (3571 lbs)(A/T) | |
| Curb weight 135i Coupe | 1530 kg (3373 lbs)(M/T) |
| 1535 kg (3384 lbs)(A/T) | |
| Curb weight 135i Cabriolet | 1660 kg (3660 lbs)(M/T) |
| 1665 kg (3671 lbs)(A/T) | |
| Wheelbase | 2660 mm (104.7 in.) |
| Length | 4373 mm (172.2 in.) |
| Width | 1748 mm (68.8 in.) |
| Height 128i Coupe | 1423 mm (56.0 in.) |
| Height 135i Coupe | 1408 mm (55.4 in.) |
| Height Cabriolet | 1411 mm (55.6 in.) |
| Cargo capacity coupe | 370 litres (13.0 cu. ft.) |
| Cargo capacity cabriolet | 260 litres (9.1 cu. ft.)(top up) |
| 305 litres (10.7 cu. ft.)(top down) | |
| Fuel consumption 128i M/T | City: 10.9 L/100 km (26 mpg Imp) |
| Hwy: 7.0 L/100 km (40 mpg Imp) | |
| Fuel consumption 128i A/T | City: 11.3 L/100 km (25 mpg Imp) |
| Hwy: 6.9 L/100 km (41 mpg Imp) | |
| Fuel consumption 135i M/T | City: 11.5 L/100 km (25 mpg Imp) |
| Hwy: 7.7 L/100 km (37 mpg Imp) | |
| Fuel consumption 135i A/T | City: 11.9 L/100 km (24 mpg Imp) |
| Hwy: 7.8 L/100 km (36 mpg Imp) | |
| Fuel type | Premium |
| Warranty | 4 yrs/80,000 km |
| Powertrain warranty | 4 yrs/80,000 km |
| Side airbags | Standard |
| Curtain airbags | Standard (Coupe) |
| N/A (Cabriolet) | |
| Anti-lock brakes | Standard |
| Traction control | Standard |
| Stability control | Standard |
| Assembly location | Leipzig, Germany |
| Regensburg, Germany |

