Comparison BMW 6 Series (E63) 645 Ci (333 Hp) & Mercedes-Benz A-class (W176) A 200 CDI (136 Hp) DCT & Mercedes-Benz Maybach G-class G 650 Landaulet V12 (630 Hp) 4MATIC 7G-TRONIC
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| Brand: | BMW | Mercedes-Benz | Mercedes-Benz |
| Model: | 6 Series | A-class | G-class |
| Generation: | 6 Series (E63) | A-class (W176) | Maybach G-class |
| Engine / modification: | 645 Ci (333 Hp) | A 200 CDI (136 Hp) DCT | G 650 Landaulet V12 (630 Hp) 4MATIC 7G-TRONIC |
| Production start: | 2003 year | 2012 year | 2017 year |
| Production end: | 2005 year | 2014 year | 2017 year |
| Coupe type: | Coupe | Hatchback | |
| Num. of Doors: | 2 | 5 | 5 |
| Num. of seats: | 2+2 | 5 | 4 |
| Fuel consumption / economy - urban: | 17.2 l/100 km | 5.0-4.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 8.6 l/100 km | 4.1-3.8 l/100 km | |
| Fuel consumption / economy - combined: | 11.7 l/100 km | 4.4-4.1 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | ||
| Fuel tank volume: | 70 l | 50 l | 96 l |
| Emission standard: | Euro 4 | EURO V | Euro 6 |
| CO2 emissions: | 283 g/km | 116-109 g/km | |
| Power: | 333 hp | 136 hp | 630 hp |
| Max power in: | 6100 rpm. | 3600-4400 rpm. | 5000 rpm. |
| Maximum speed: | 250 km/h | 210 km/h | 180 , Electronically limited km/h |
| Acceleration from 0 to 100 km/h: | 5.6 sec | 9.2 sec | 5.3 sec |
| Torque: | 450 Nm @ 3600 rpm. | 300 Nm/1600-3000 rpm. | 1000 Nm @ 2300 rpm. |
| Model Engine: | N63B44 | OM 651 DE 18 LA | M 279.982 |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 4398 cm3 | 1796 cm3 | 5980 cm3 |
| Engine oil capacity: | 8.0 l | 10.5 l | |
| Coolant: | 14.2 l | ||
| Fuel System: | Multi-point injection | Diesel Commonrail | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | V engine | Inline | |
| Valvetrain: | DOHC | SOHC | |
| Number of cylinders: | 8 | 4 | 12 |
| Number of valves per cylinder: | 4 | 4 | 3 |
| Compression ratio: | 10 | 16.2 | 9 |
| Piston Stroke: | 82.7 mm | 93 mm | |
| Cylinder Bore: | 92 mm | 82.6 mm | |
| Wheel Drive: | Rear wheel drive | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 G-DCT | 7G-TRONIC SPEEDSHIFT PLUS | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4820 mm | 4292 mm | 5345 mm |
| Width: | 1855 mm | 1780 mm | 1855 mm |
| Width including mirrors: | 2056 mm | ||
| Height: | 1373 mm | 1433 mm | 2235 mm |
| Wheelbase: | 2780 mm | 2699 mm | 3428 mm |
| Front track: | 1558 mm | 1553 mm | |
| Rear (Back) track: | 1592 mm | 1552 mm | |
| Ride height(clearance): | 450 mm | ||
| Approach angle: | 51.6 ° | ||
| Departure angle: | 43.8 ° | ||
| Ramp angle: | 47.4 ° | ||
| Climb angle: | 45 ° | ||
| Wading depth: | 1000 mm | ||
| Minimum volume of Luggage (trunk): | 450 l | 341 l | |
| Maximum amount of Luggage (trunk): | 1157 l | ||
| Front suspension: | Coil spring | McPherson | |
| Rear suspension: | Helical spring | Trailing | |
| Max weight: | 2065 kg | 2000 kg | 3200 kg |
| Front brakes: | Disc | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc | Ventilated discs |
| Kerb Weight: | 1690 kg | 1475 kg | 2505 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Electric Steering | Hydraulic Steering |
| Max. roof load: | 200 kg | ||
| Minimum turning circle (turning diameter): | 11.4 m | 11 m | 14.3 m |
| Permitted trailer load with brakes (12%): | 3500 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 140 kg | ||
| Tire size: | 245/45 R18 | 205/55 R16 | 325/55 R22 |
| Wheel rims size: | 8J x 18 | R16 | R22 |