Comparison Mercedes-Benz R-class (W251) Long R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC & Audi A7 Sportback (C7 facelift 2014) 3.0 BiTDI V6 clean diesel (320 Hp) quattro Tiptronic & Mercedes-Benz Viano (W639 facelift 2010) CDI 2.0 (136 Hp)
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| Brand: | Mercedes-Benz | Audi | Mercedes-Benz |
| Model: | R-class | A7 | Viano |
| Generation: | R-class (W251) Long | A7 Sportback (C7 facelift 2014) | Viano (W639 facelift 2010) |
| Engine / modification: | R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC | 3.0 BiTDI V6 clean diesel (320 Hp) quattro Tiptronic | CDI 2.0 (136 Hp) |
| Production start: | 2007 year | 2014 year | 2010 year |
| Production end: | 2009 year | 2018 year | 2014 year |
| Coupe type: | Combi | Hatchback | Minivan |
| Num. of Doors: | 5 | 5 | 5 |
| Num. of seats: | 5-7 | 5 | 6 |
| Fuel consumption / economy - urban: | 7.4 l/100 km | 8.8-8.7 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.4 l/100 km | 6.4-6.3 l/100 km | |
| Fuel consumption / economy - combined: | 9.3 l/100 km | 6.1 l/100 km | 7.2-7.1 l/100 km |
| Fuel Type: | Diesel | Diesel | Diesel |
| Drag coefficient: | 0.29 | ||
| Fuel tank volume: | 80 l | 73 l | 75 l |
| Emission standard: | EURO V | Euro 6 | |
| CO2 emissions: | 246 g/km | 162 g/km | 190-187 g/km |
| Power: | 224 hp | 320 hp | 136 hp |
| Max power in: | 3900-4600 rpm. | 3800 rpm. | |
| Maximum speed: | 222 km/h | 250 km/h | 174 km/h |
| Acceleration from 0 to 100 km/h: | 8.8 sec | 5.2 sec | 14.1 sec |
| Torque: | 510 Nm | 650 Nm @ 1400-2800 rpm. | 310 Nm @ 1400-2400 rpm. |
| Model Engine: | CVUA | ||
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2987 cm3 | 2967 cm3 | 2143 cm3 |
| Engine oil capacity: | 6.4 l | ||
| Coolant: | 11.5 l | ||
| Fuel System: | Diesel Commonrail | Diesel Commonrail | Diesel Commonrail |
| Maximum engine speed: | 4500 . rpm. | ||
| Aspiration / Turbine: | Turbocharger / Intercooler | BiTurbo | 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 | 4 | |
| Compression ratio: | 16.5 | 15.5 | |
| Piston Stroke: | 92 mm | 91.4 mm | |
| Cylinder Bore: | 83 mm | 83 mm | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | 8 Tiptronic | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 5157 mm | 4974 mm | 4763 mm |
| Width: | 1922 mm | 1911 mm | 1901 mm |
| Width including mirrors: | 2139 mm | ||
| Height: | 1659 mm | 1420 mm | 1875 mm |
| Wheelbase: | 3215 mm | 2914 mm | 3200 mm |
| Front track: | 1644 mm | ||
| Rear (Back) track: | 1635 mm | ||
| Front overhang: | 937 mm | ||
| Rear overhang: | 1123 mm | ||
| Minimum volume of Luggage (trunk): | 535 l | ||
| Maximum amount of Luggage (trunk): | 2385 l | 1390 l | |
| Front suspension: | Double wishbone | Multi-link suspension | |
| Rear suspension: | Independent, spring multi-link with stabilizer | Independent on trapezoidal lever | |
| Max weight: | 2895 kg | 2505 kg | 2800 kg |
| Front brakes: | Disc | Ventilated discs | |
| Rear brakes: | Disc | Ventilated discs | |
| Kerb Weight: | 2295 kg | 1895 kg | 2030 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | Electric Steering |
| Max. roof load: | 100 kg | 100 kg | |
| Permitted trailer load with brakes (8%): | 2100 kg | ||
| Minimum turning circle (turning diameter): | 11.9 m | ||
| Permitted trailer load with brakes (12%): | 2100 kg | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | 750 kg | |
| Permitted towbar download: | 85 kg | ||
| Tire size: | 235/65 R17 | 255/45 R18 | 205/65 R16 |
| Wheel rims size: | 7.5J x 17 | 8.5J x 18 | R16 |