Comparison Renault 21 (B48) 2.1 TD (88 Hp) & Alpina D3 (E90) 2.0 Bi-Turbo Disel (214 Hp) Switch-Tronic & BMW 4 Series Gran Coupe (F36) 435i (306 Hp) Steptronic
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| Brand: | Renault | Alpina | BMW |
| Model: | 21 | D3 | 4 Series |
| Generation: | 21 (B48) | D3 (E90) | 4 Series Gran Coupe (F36) |
| Engine / modification: | 2.1 TD (88 Hp) | 2.0 Bi-Turbo Disel (214 Hp) Switch-Tronic | 435i (306 Hp) Steptronic |
| Production start: | 1989 year | 2008 year | 2014 year |
| Production end: | 1993 year | 2013 year | 2016 year |
| Coupe type: | Sedan | Sedan | Coupe |
| Num. of Doors: | 4 | 4 | 5 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 8.3 l/100 km | 7.5 l/100 km | 10.7 l/100 km |
| Fuel consumption / economy - extra urban: | 5 l/100 km | 4.5 l/100 km | 5.6 l/100 km |
| Fuel consumption / economy - combined: | 6.7 l/100 km | 5.6 l/100 km | 7.5 l/100 km |
| Fuel Type: | Diesel | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | ||
| Fuel tank volume: | 66 l | 61 l | 60 l |
| Emission standard: | EURO V | Euro 6 | |
| CO2 emissions: | 174 g/km | ||
| Power: | 88 hp | 214 hp | 306 hp |
| Max power in: | 4250 rpm. | 4100 rpm. | 5800-6400 rpm. |
| Maximum speed: | 177 km/h | 244 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 11.8 sec | 6.9 sec | 5.2 sec |
| Torque: | 184 Nm @ 2000 rpm. | 450 Nm/2000 rpm. | 400 Nm @ 1200-5000 rpm. |
| Model Engine: | J8S | Alpina D3-2.0 | N55B30 |
| Engine position: | Front, transverse | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2068 cm3 | 1995 cm3 | 2979 cm3 |
| Engine oil capacity: | 6.1 l | 6.5 l | |
| Coolant: | 7.2 l | 7.2 l | |
| Fuel System: | Diesel - Standard diesel injection (SDI) | Diesel Commonrail | Direct injection |
| Aspiration / Turbine: | Turbocharging | Turbocharging | Twin-power turbo |
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | OHC | ||
| Number of cylinders: | 4 | 4 | 6 |
| Number of valves per cylinder: | 2 | 4 | 4 |
| Compression ratio: | 21 | 17 | 10.2 |
| Piston Stroke: | 89 mm | 90 mm | 89.6 mm |
| Cylinder Bore: | 86 mm | 84 mm | 84 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 6 | 8 Steptronic |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4530 mm | 4545 mm | 4638 mm |
| Width: | 1730 mm | 1817 mm | 1825 mm |
| Height: | 1415 mm | 1413 mm | 1389 mm |
| Wheelbase: | 2660 mm | 2760 mm | 2810 mm |
| Front track: | 1430 mm | 1500 mm | 1545 mm |
| Rear (Back) track: | 1400 mm | 1513 mm | 1594 mm |
| Ride height(clearance): | 130 mm | ||
| Minimum volume of Luggage (trunk): | 490 l | 450 l | 480 l |
| Maximum amount of Luggage (trunk): | 1300 l | ||
| Front suspension: | The depreciated rack | The depreciated rack | Independent, spring |
| Rear suspension: | Torsion | Helical spring | Multi-link independent |
| Max weight: | 1620 kg | 2000 kg | 2145 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Drum | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1130 kg | 1565 kg | 1585 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 11.3 m | ||
| Permitted trailer load with brakes (12%): | 1700 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 75 kg | ||
| Tire size: | 185/70 R13 | 245/40R18ZR; 265/40R18ZR | 225/50 R17 94W |
| Wheel rims size: | R13 | 7.5J x 17 |