Comparison Mercedes-Benz R-class (W251) Long R 500 V6 (388 Hp) 4MATIC G-TRONIC & Audi A3 Sportback (8V) 2.0 TDI (184 Hp) clean diesel quattro S-tronic
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| Brand: | Mercedes-Benz | Audi |
| Model: | R-class | A3 |
| Generation: | R-class (W251) Long | A3 Sportback (8V) |
| Engine / modification: | R 500 V6 (388 Hp) 4MATIC G-TRONIC | 2.0 TDI (184 Hp) clean diesel quattro S-tronic |
| Production start: | 2008 year | 2014 year |
| Production end: | 2010 year | 2016 year |
| Coupe type: | Combi | Hatchback |
| Num. of Doors: | 5 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 18.2-18.4 l/100 km | 5.4 l/100 km |
| Fuel consumption / economy - extra urban: | 9.8-10.0 l/100 km | 4.3 l/100 km |
| Fuel consumption / economy - combined: | 12.9-13.1 l/100 km | 4.7 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 80 l | 55 l |
| Emission standard: | EURO V | EURO VI |
| CO2 emissions: | 306 g/km | 124 g/km |
| Power: | 388 hp | 184 hp |
| Max power in: | 6000 rpm. | 3500-4000 rpm. |
| Maximum speed: | 250 km/h | 230 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | 6.9 sec |
| Torque: | 530 Nm @ 2800-4800 rpm. | 380 Nm/1750-3250 rpm. |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 5461 cm3 | 1968 cm3 |
| Engine oil capacity: | 4.6 l | |
| Fuel System: | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.7 | 15.8 |
| Piston Stroke: | 90.5 mm | 95.5 mm |
| Cylinder Bore: | 98 mm | 81 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | 6 S-tronic |
| Length: | 5157 mm | 4310 mm |
| Width: | 1922 mm | 1786 mm |
| Width including mirrors: | 1966 mm | |
| Height: | 1674 mm | 1426 mm |
| Wheelbase: | 3215 mm | 2636 mm |
| Front track: | 1661 mm | 1536 mm |
| Rear (Back) track: | 1651 mm | 1506 mm |
| Minimum volume of Luggage (trunk): | 380 l | |
| Maximum amount of Luggage (trunk): | 2385 l | 1220 l |
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Independent, spring multi-link with stabilizer | Multi-link independent |
| Max weight: | 2920 kg | 1980 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 2265 kg | 1420 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 | 75 kg |
| Permitted trailer load with brakes (8%): | 1800 kg | |
| Minimum turning circle (turning diameter): | 12.4 m | 10.9 m |
| Permitted trailer load with brakes (12%): | 2100 kg | 1800 kg |
| Permitted trailer load without brakes: | 750 kg | 740 kg |
| Permitted towbar download: | 75 kg | |
| Tire size: | 255/55 R19 W | 205/55 R16 |
| Wheel rims size: | R19 | 6.5J x 16 |