Comparison BMW 4 Series Gran Coupe (F36) 420i (184 Hp) Steptronic & Audi A8 (D2,4D) 3.3 TDI V8 (224 Hp) Tiptronic & Audi TT Roadster (8N, facelift 2000) 1.8 T (180 Hp)
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| Brand: | BMW | Audi | Audi |
| Model: | 4 Series | A8 | TT |
| Generation: | 4 Series Gran Coupe (F36) | A8 (D2,4D) | TT Roadster (8N, facelift 2000) |
| Engine / modification: | 420i (184 Hp) Steptronic | 3.3 TDI V8 (224 Hp) Tiptronic | 1.8 T (180 Hp) |
| Production start: | 2014 year | 1999 year | 2000 year |
| Production end: | 2016 year | 2002 year | 2005 year |
| Coupe type: | Coupe | Sedan | Roadster |
| Num. of Doors: | 5 | 4 | 2 |
| Num. of seats: | 5 | 5 | 2 |
| Fuel consumption / economy - urban: | 8.4 l/100 km | 13.8 l/100 km | 11.2 l/100 km |
| Fuel consumption / economy - extra urban: | 5.0 l/100 km | 7.3 l/100 km | 6.4 l/100 km |
| Fuel consumption / economy - combined: | 6.3 l/100 km | 9.7 l/100 km | 8.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.34 | |
| Fuel tank volume: | 60 l | 90 l | 55 l |
| Emission standard: | Euro 6 | Euro 3 | Euro 4 |
| CO2 emissions: | 146 g/km | 261 g/km | 197 g/km |
| Power: | 184 hp | 224 hp | 180 hp |
| Max power in: | 5000-6250 rpm. | 4000 rpm. | 5500 rpm. |
| Maximum speed: | 236 km/h | 242 km/h | 222 km/h |
| Acceleration from 0 to 100 km/h: | 7.6 sec | 8.2 sec | 8.1 sec |
| Torque: | 270 Nm @ 1250-4500 rpm. | 480 Nm @ 1800-3000 rpm. | 235 Nm @ 1950 rpm. |
| Model Engine: | N20B20 | AKF | AJQ, APP, ATC, AUQ |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, transverse |
| Engine displacement: | 1997 cm3 | 3328 cm3 | 1781 cm3 |
| Engine oil capacity: | 5 l | 5.3 l | 4.5 l |
| Coolant: | 7.6 l | 6.0 l | 7 l |
| Fuel System: | Direct injection | Diesel Commonrail | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharging |
| Position of cylinders: | Inline | V engine | Inline |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 4 | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 | 5 |
| Compression ratio: | 11 | 18.5 | 9.5 |
| Piston Stroke: | 90.1 mm | 86.4 mm | 86.4 mm |
| Cylinder Bore: | 84 mm | 78.3 mm | 81 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | 5 Tiptronic | - |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4638 mm | 5034 mm | 4041 mm |
| Width: | 1825 mm | 1880 mm | 1764 mm |
| Height: | 1389 mm | 1440 mm | 1349 mm |
| Wheelbase: | 2810 mm | 2882 mm | 2422 mm |
| Front track: | 1557 mm | 1591 mm | 1528 mm |
| Rear (Back) track: | 1605 mm | 1580 mm | 1513 mm |
| Minimum volume of Luggage (trunk): | 525 l | 220 l | |
| Front suspension: | Independent, spring | Multi-link suspension | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Multi-link independent | Independent on trapezoidal lever | independent torsion suspension |
| Max weight: | 2065 kg | 2460 kg | 1640 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs | Disc |
| Kerb Weight: | 1580 kg | 1860 kg | 1340 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | ||
| Permitted trailer load with brakes (8%): | 2300 kg | ||
| Minimum turning circle (turning diameter): | 12.3 m | 10.6 m | |
| Permitted trailer load with brakes (12%): | 2300 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 95 kg | ||
| Tire size: | 225/50 R17 94W | 225/60 R16 | 205/55 R16 |
| Wheel rims size: | 7.5J x 17 | 7.5J x 16 | 7J x 16 |