Comparison Mercedes-Benz R-class (W251, facelift 2010) Short R 300 CDI V6 BlueEFFICIENCY (190 Hp) G-TRONIC & Audi A4 Avant (B5, Typ 8D) 2.8 V6 (174 Hp) quattro & Audi A4 Avant (B9 8W) 2.0 TDI ultra (150 Hp) S tronic
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| Brand: | Mercedes-Benz | Audi | Audi |
| Model: | R-class | A4 | A4 |
| Generation: | R-class (W251, facelift 2010) Short | A4 Avant (B5, Typ 8D) | A4 Avant (B9 8W) |
| Engine / modification: | R 300 CDI V6 BlueEFFICIENCY (190 Hp) G-TRONIC | 2.8 V6 (174 Hp) quattro | 2.0 TDI ultra (150 Hp) S tronic |
| Production start: | 2010 year | 1996 year | 2015 year |
| Production end: | 2014 year | 1997 year | |
| Coupe type: | Combi | Combi | Combi |
| Num. of Doors: | 5 | 5 | 5 |
| Num. of seats: | 5-7 | 5 | 5 |
| Fuel consumption / economy - urban: | 9.6-9.9 l/100 km | 4.7-5.0 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.4-6.7 l/100 km | 3.5-3.8 l/100 km | |
| Fuel consumption / economy - combined: | 7.6-7.8 l/100 km | 3.9-4.2 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.32 | 0.26 | |
| Fuel tank volume: | 80 l | 60 l | 40 l |
| Emission standard: | EURO V | EURO VI | |
| CO2 emissions: | 199-206 g/km | 102-110 g/km | |
| Power: | 190 hp | 174 hp | 150 hp |
| Max power in: | 3800 rpm. | 5500 rpm. | 3250-4200 rpm. |
| Maximum speed: | 215 km/h | 229 km/h | 210 km/h |
| Acceleration from 0 to 100 km/h: | 9.5 sec | 9.0 sec | |
| Torque: | 440 Nm @ 1400-2800 rpm. | 250 Nm @ 3000 rpm. | 320 Nm/1500-3250 rpm. |
| Model Engine: | AAH | ||
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2987 cm3 | 2771 cm3 | 1968 cm3 |
| Engine oil capacity: | 5.0 l | 4.7 l | |
| Fuel System: | Diesel Commonrail | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharger / Intercooler | Turbo / Intercooler (Turbocharging / Intercooler) | |
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 6 | 4 |
| Number of valves per cylinder: | 4 | 2 | 4 |
| Compression ratio: | 15.5 | 10.3 | 16.2 |
| Piston Stroke: | 86.4 mm | 95.5 mm | |
| Cylinder Bore: | 82.5 mm | 81 mm | |
| Wheel Drive: | Rear wheel drive | Front wheel drive | |
| Number of Gears (automatic transmission): | 7G-TRONIC | 7 S-tronic | |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4922 mm | 4478 mm | 4725 mm |
| Width: | 1922 mm | 1733 mm | 1842 mm |
| Width including mirrors: | 2183 mm | 2022 mm | |
| Height: | 1674 mm | 1415 mm | 1434 mm |
| Wheelbase: | 2980 mm | 2607 mm | 2820 mm |
| Front track: | 1661 mm | 1498 mm | 1572 mm |
| Rear (Back) track: | 1651 mm | 1479 mm | 1555 mm |
| Front overhang: | 922 mm | 880 mm | |
| Rear overhang: | 1020 mm | 1025 mm | |
| Minimum volume of Luggage (trunk): | 550 l | 390 l | 505 l |
| Maximum amount of Luggage (trunk): | 1950 l | 1250 l | 1510 l |
| Front suspension: | Double wishbone | Independent multi-link | |
| Rear suspension: | Independent, spring multi-link with stabilizer | Multi-link independent | |
| Max weight: | 2840 kg | 2145 kg | |
| Front brakes: | Disc | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc | Disc |
| Kerb Weight: | 2110 kg | 1525 kg | |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | ||
| Power steering: | Electric Steering | ||
| Max. roof load: | 90 kg | ||
| Permitted trailer load with brakes (8%): | 1600 kg | ||
| Minimum turning circle (turning diameter): | 11.1 m | 11.6 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | 1400 kg | |
| Permitted trailer load without brakes: | 750 kg | 750 kg | |
| Permitted towbar download: | 80 kg | ||
| Tire size: | 235/65 R17 | 205/60 R16; 225/50 R17; 245/40 R18 | |
| Wheel rims size: | R17 | 7J x 16; R17; R18 |