Comparison Mercedes-Benz R-class (W251) Long R 500 V6 (388 Hp) 4MATIC G-TRONIC & Mercedes-Benz GLK GLK 280 (231 Hp) 4Matic 7G-Tronic & Audi S3 Sedan (8V facelift 2016) 2.0 TFSI (310 Hp) quattro
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| Brand: | Mercedes-Benz | Mercedes-Benz | Audi |
| Model: | R-class | GLK | S3 |
| Generation: | R-class (W251) Long | GLK | S3 Sedan (8V facelift 2016) |
| Engine / modification: | R 500 V6 (388 Hp) 4MATIC G-TRONIC | GLK 280 (231 Hp) 4Matic 7G-Tronic | 2.0 TFSI (310 Hp) quattro |
| Production start: | 2008 year | 2008 year | 2016 year |
| Production end: | 2010 year | 2012 year | |
| Coupe type: | Combi | Off-road vehicle | Sedan |
| Num. of Doors: | 5 | 5 | 4 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 18.2-18.4 l/100 km | 9.1-9.2 l/100 km | |
| Fuel consumption / economy - extra urban: | 9.8-10.0 l/100 km | 5.8-5.9 l/100 km | |
| Fuel consumption / economy - combined: | 12.9-13.1 l/100 km | 10.2 l/100 km | 7.0-7.1 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | ||
| Fuel tank volume: | 80 l | 66 l | 55 l |
| Emission standard: | EURO V | Euro 4 | EURO VI |
| CO2 emissions: | 306 g/km | 162-163 g/km | |
| Power: | 388 hp | 231 hp | 310 hp |
| Max power in: | 6000 rpm. | 6000 rpm. | 5800-6200 rpm. |
| Maximum speed: | 250 km/h | 210 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | 7.6 sec | 5.3 sec |
| Torque: | 530 Nm @ 2800-4800 rpm. | 300 Nm @ 2500 rpm. | 380 Nm/1850-5700 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, transverse |
| Engine displacement: | 5461 cm3 | 2996 cm3 | 1984 cm3 |
| Engine oil capacity: | 5.7 l | ||
| Coolant: | 10 l | ||
| Fuel System: | Multi-point injection | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Turbocharging | ||
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | - | DOHC | |
| Number of cylinders: | 8 | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10.7 | 11.1 | 9.3 |
| Piston Stroke: | 90.5 mm | 82.1 mm | 92.8 mm |
| Cylinder Bore: | 98 mm | 88 mm | 82.5 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | 7 | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 5157 mm | 4528 mm | 4466 mm |
| Width: | 1922 mm | 1840 mm | 1796 mm |
| Width including mirrors: | 1960 mm | ||
| Height: | 1674 mm | 1680 mm | 1392 mm |
| Wheelbase: | 3215 mm | 2755 mm | 2631 mm |
| Front track: | 1661 mm | 1551 mm | |
| Rear (Back) track: | 1651 mm | 1526 mm | |
| Front overhang: | 870 mm | ||
| Rear overhang: | 965 mm | ||
| Minimum volume of Luggage (trunk): | 450 l | 390 l | |
| Maximum amount of Luggage (trunk): | 2385 l | ||
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Independent, spring multi-link with stabilizer | 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 | Ventilated discs | |
| Kerb Weight: | 2265 kg | 1830 kg | 1430 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 | |
| Minimum turning circle (turning diameter): | 12.4 m | 11.0 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Tire size: | 255/55 R19 W | 235/60 R17 | 225/40 R18; 235/35 R19 |
| Wheel rims size: | R19 | 8J x 18; R19 |