Comparison Mercedes-Benz R-class (W251) Long R 350 V6 (272 Hp) G-TRONIC & Audi A4 (B5, Typ 8D) 2.5 TDI V6 (150 Hp) Tiptronic
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| Brand: | Mercedes-Benz | Audi |
| Model: | R-class | A4 |
| Generation: | R-class (W251) Long | A4 (B5, Typ 8D) |
| Engine / modification: | R 350 V6 (272 Hp) G-TRONIC | 2.5 TDI V6 (150 Hp) Tiptronic |
| Production start: | 2007 year | 1997 year |
| Production end: | 2010 year | 1999 year |
| Coupe type: | Combi | Sedan |
| Num. of Doors: | 5 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 15.4-15.6 l/100 km | 11.4 l/100 km |
| Fuel consumption / economy - extra urban: | 8.6-8.8 l/100 km | 5.7 l/100 km |
| Fuel consumption / economy - combined: | 11.1-11.3 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 80 l | 62 l |
| Emission standard: | EURO V | |
| CO2 emissions: | 265 g/km | |
| Power: | 272 hp | 150 hp |
| Max power in: | 6000 rpm. | 4000 rpm. |
| Maximum speed: | 234 km/h | 214 km/h |
| Acceleration from 0 to 100 km/h: | 8.2 sec | 9.8 sec |
| Torque: | 350 Nm @ 2400-5000 rpm. | 310 Nm/1500 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3498 cm3 | 2496 cm3 |
| Fuel System: | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | |
| Compression ratio: | 10.7 | 19.5 |
| Piston Stroke: | 86.4 mm | |
| Cylinder Bore: | 78.3 mm | |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | 5 Tiptronic |
| Length: | 5157 mm | 4479 mm |
| Width: | 1922 mm | 1733 mm |
| Height: | 1674 mm | 1415 mm |
| Wheelbase: | 3215 mm | 2617 mm |
| Front track: | 1661 mm | 1498 mm |
| Rear (Back) track: | 1651 mm | 1479 mm |
| Minimum volume of Luggage (trunk): | 440 l | |
| Maximum amount of Luggage (trunk): | 2385 l | |
| Front suspension: | Double wishbone | Wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Suspension with traction connecting levers |
| Max weight: | 2810 kg | 1905 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 2175 kg | 1355 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 12.4 m | 11.1 m |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 235/65 R17 | 195/65 R15 |
| Wheel rims size: | R17 | R15 |