Comparison Audi A4 (B8 8K) 2.0 TDI (120 Hp) & Mercedes-Benz R-class (W251) Long R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC
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| Brand: | Audi | Mercedes-Benz |
| Model: | A4 | R-class |
| Generation: | A4 (B8 8K) | R-class (W251) Long |
| Engine / modification: | 2.0 TDI (120 Hp) | R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC |
| Production start: | 2008 year | 2007 year |
| Production end: | 2011 year | 2009 year |
| Coupe type: | Sedan | Combi |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5-7 |
| Fuel consumption / economy - urban: | 6.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 4.5 l/100 km | |
| Fuel consumption / economy - combined: | 5.3 l/100 km | 9.3 l/100 km |
| Fuel Type: | Diesel | Diesel |
| Drag coefficient: | 0.28 | |
| Fuel tank volume: | 65 l | 80 l |
| Emission standard: | Euro 4 | EURO V |
| CO2 emissions: | 246 g/km | |
| Power: | 120 hp | 224 hp |
| Max power in: | 4200 rpm. | |
| Maximum speed: | 197 km/h | 222 km/h |
| Acceleration from 0 to 100 km/h: | 11.2 sec | 8.8 sec |
| Torque: | 290 Nm @ 1750-2500 rpm. | 510 Nm |
| Model Engine: | CAFA, CAGC | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1968 cm3 | 2987 cm3 |
| Engine oil capacity: | 5.0 l | |
| Fuel System: | Diesel Commonrail | Diesel Commonrail |
| Maximum engine speed: | 4500 . rpm. | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharger / Intercooler |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.5 | 16.5 |
| Piston Stroke: | 95.5 mm | 92 mm |
| Cylinder Bore: | 81 mm | 83 mm |
| Wheel Drive: | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4703 mm | 5157 mm |
| Width: | 1826 mm | 1922 mm |
| Height: | 1427 mm | 1659 mm |
| Wheelbase: | 2808 mm | 3215 mm |
| Front track: | 1564 mm | |
| Rear (Back) track: | 1551 mm | |
| Minimum volume of Luggage (trunk): | 480 l | |
| Maximum amount of Luggage (trunk): | 962 l | 2385 l |
| Front suspension: | Independent multi-link | Double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Independent, spring multi-link with stabilizer |
| Max weight: | 2010 kg | 2895 kg |
| Front brakes: | Disc | Disc |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1500 kg | 2295 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 11.4 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 225/55 R16; 225/50 R17 | 235/65 R17 |
| Wheel rims size: | 7.5J x 16; 7.5J x 17 | 7.5J x 17 |