Comparison Mercedes-Benz R-class (W251) Long R 500 V6 (388 Hp) 4MATIC G-TRONIC & Audi A4 (B9 8W, facelift 2018) 50 TDI (286 Hp) quattro Tiptronic
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| Brand: | Mercedes-Benz | Audi |
| Model: | R-class | A4 |
| Generation: | R-class (W251) Long | A4 (B9 8W, facelift 2018) |
| Engine / modification: | R 500 V6 (388 Hp) 4MATIC G-TRONIC | 50 TDI (286 Hp) quattro Tiptronic |
| Production start: | 2008 year | 2019 year |
| Production end: | 2010 year | 2019 year |
| Coupe type: | Combi | Sedan |
| Num. of Doors: | 5 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 18.2-18.4 l/100 km | 6.9-7.1 l/100 km |
| Fuel consumption / economy - extra urban: | 9.8-10.0 l/100 km | 5.0-5.3 l/100 km |
| Fuel consumption / economy - combined: | 12.9-13.1 l/100 km | 5.7-6.0 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Fuel tank volume: | 80 l | 58 l |
| Emission standard: | EURO V | Euro 6d - TEMP |
| CO2 emissions: | 306 g/km | 150-156 g/km |
| Power: | 388 hp | 286 hp |
| Max power in: | 6000 rpm. | 3500-4000 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | 5.2 sec |
| Torque: | 530 Nm @ 2800-4800 rpm. | 620 Nm @ 2250-3000 rpm. |
| Model Engine: | DCPC | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 5461 cm3 | 2967 cm3 |
| Engine oil capacity: | 6.1 l | |
| Fuel System: | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Turbocharger / Intercooler | |
| Position of cylinders: | V engine | Inline |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | |
| Compression ratio: | 10.7 | |
| Piston Stroke: | 90.5 mm | |
| Cylinder Bore: | 98 mm | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | Tiptronic |
| Length: | 5157 mm | 4738 mm |
| Width: | 1922 mm | 1842 mm |
| Width including mirrors: | 2022 mm | |
| Height: | 1674 mm | 1428 mm |
| Wheelbase: | 3215 mm | 2820 mm |
| Front track: | 1661 mm | 1572 mm |
| Rear (Back) track: | 1651 mm | 1555 mm |
| Front overhang: | 880 mm | |
| Rear overhang: | 1038 mm | |
| Minimum volume of Luggage (trunk): | 480 l | |
| Maximum amount of Luggage (trunk): | 2385 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 2920 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 2265 kg | 1690 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 100 kg | 90 kg |
| Permitted trailer load with brakes (8%): | 2100 kg | |
| Minimum turning circle (turning diameter): | 12.4 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | 1900 kg |
| Permitted trailer load without brakes: | 750 kg | 750 kg |
| Permitted towbar download: | 80 kg | |
| Tire size: | 255/55 R19 W | |
| Wheel rims size: | R19 |