Comparison Buick Excelle GX II (facelift 2018) 15S (118 Hp) Automatic & BMW 8 Series Convertible (G14) 840i (333 Hp) xDrive Steptronic
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| Brand: | Buick | BMW |
| Model: | Excelle GT | 8 Series |
| Generation: | Excelle GX II (facelift 2018) | 8 Series Convertible (G14) |
| Engine / modification: | 15S (118 Hp) Automatic | 840i (333 Hp) xDrive Steptronic |
| Production start: | 2018 year | 2020 year |
| Coupe type: | Combi | Cabriolet |
| Num. of Doors: | 5 | 2 |
| Num. of seats: | 5 | 4 |
| Fuel consumption / economy - combined: | 6.1 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | |
| Fuel tank volume: | 52 l | 68 l |
| Emission standard: | Euro 6d | |
| Power: | 118 hp | 333 hp |
| Max power in: | 6600 rpm. | 5500-6250 rpm. |
| Maximum speed: | 180 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 12.8 sec | 5.2 sec |
| Torque: | 146 Nm @ 4000 rpm. | 500 Nm @ 1700-4000 rpm. |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1490 cm3 | 2998 cm3 |
| Engine oil capacity: | 6.5 l | |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | Turbocharger | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | VALVETRONIC | |
| Number of cylinders: | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11 | |
| Piston Stroke: | 94.6 mm | |
| Cylinder Bore: | 82 mm | |
| Wheel Drive: | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 DSS | 8 Steptronic |
| Length: | 4718 mm | 4843 mm |
| Width: | 1802 mm | 1902 mm |
| Height: | 1466 mm | 1339 mm |
| Wheelbase: | 2700 mm | 2822 mm |
| Front track: | 1540 mm | 1627 mm |
| Rear (Back) track: | 1558 mm | 1642 mm |
| Ride height(clearance): | 118 mm | |
| Minimum volume of Luggage (trunk): | 460 l | 350 l |
| Front suspension: | Independent type McPherson | Double wishbone |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2400 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1295 kg | 1915 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 11.6 m | |
| Tire size: | 205/55 R16 | Front wheel tires: 245/45 R18 100Y XL |
| Wheel rims size: | R16 | Front wheel rims: 8J x 18 |