Comparison BMW 1 Series Hatchback 3dr (F21 LCI, facelift 2017) 125i (224 Hp) Steptronic & BMW 4 Series Convertible (F33) 435i (306 Hp) xDrive & BMW 7 Series (E38) 728i (193 Hp) Steptronic
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| Brand: | BMW | BMW | BMW |
| Model: | 1 Series | 4 Series | 7 Series |
| Generation: | 1 Series Hatchback 3dr (F21 LCI, facelift 2017) | 4 Series Convertible (F33) | 7 Series (E38) |
| Engine / modification: | 125i (224 Hp) Steptronic | 435i (306 Hp) xDrive | 728i (193 Hp) Steptronic |
| Production start: | 2017 year | 2014 year | 1995 year |
| Production end: | 2019 year | 2016 year | 1998 year |
| Coupe type: | Hatchback | Cabriolet | Sedan |
| Num. of Doors: | 3 | 2 | 4 |
| Num. of seats: | 4-5 | 4 | 5 |
| Fuel consumption / economy - urban: | 7.2-7.4 l/100 km | 11.9-12.3 l/100 km | 16.0 l/100 km |
| Fuel consumption / economy - extra urban: | 4.9-5.0 l/100 km | 6.6-6.7 l/100 km | 8.3 l/100 km |
| Fuel consumption / economy - combined: | 5.7-5.9 l/100 km | 8.5-8.7 l/100 km | 11.1 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.31 | 0.30 |
| Fuel tank volume: | 52 l | 60 l | 85 l |
| Emission standard: | Euro 6 | Euro 6 | |
| CO2 emissions: | 130-134 g/km | 199-204 g/km | |
| Power: | 224 hp | 306 hp | 193 hp |
| Max power in: | 5200-6500 rpm. | 5800-6400 rpm. | 5300 rpm. |
| Maximum speed: | 243 km/h | 250 km/h | 225 km/h |
| Acceleration from 0 to 100 km/h: | 6.1 sec | 5.6 sec | 9.6 sec |
| Torque: | 310 Nm @ 1400-5000 rpm. | 400 Nm @ 1200-5000 rpm. | 280 Nm @ 3950 rpm. |
| Model Engine: | B48B20 | N55B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1998 cm3 | 2979 cm3 | 2793 cm3 |
| Engine oil capacity: | 5-5.25 l | 6.5 l | 6.5 l |
| Coolant: | 6.7 l | 10.5 l | |
| Fuel System: | Direct injection | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo | |
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 4 | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10.2 | 10.2 | 10.2 |
| Piston Stroke: | 94.6 mm | 89.6 mm | 84 mm |
| Cylinder Bore: | 82 mm | 84 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 5 Steptronic | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4329 mm | 4638 mm | 4984 mm |
| Width: | 1765 mm | 1825 mm | 1862 mm |
| Width including mirrors: | 1984 mm | ||
| Height: | 1421 mm | 1399 mm | 1435 mm |
| Wheelbase: | 2690 mm | 2810 mm | 2930 mm |
| Front track: | 1521 mm | 1544 mm | 1552 mm |
| Rear (Back) track: | 1556 mm | 1590 mm | 1568 mm |
| Ride height(clearance): | 140 mm | 145 mm | |
| Front overhang: | 770 mm | ||
| Rear overhang: | 869 mm | ||
| Minimum volume of Luggage (trunk): | 360 l | 370 l | 500 l |
| Maximum amount of Luggage (trunk): | 1200 l | ||
| Front suspension: | Double wishbone | Independent, spring | Wishbone |
| Rear suspension: | Multi-link independent | Multi-link independent | Inclined Lever |
| Max weight: | 1965 kg | 2260 kg | 2235 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs | Disc |
| Kerb Weight: | 1400 kg | 1810 kg | 1700 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering | Hydraulic Steering |
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 10.9 m | 11.8 m | 11.6 m |
| Permitted trailer load with brakes (12%): | 1500 kg | 1800 kg | |
| Permitted trailer load without brakes: | 680 kg | 750 kg | |
| Permitted towbar download: | 75 kg | 75 kg | |
| Tire size: | 205/55 R16; 205/50 R17; 225/45 R17; 245/40 R17; 225/40 R18; 245/35 R18 | 225/50 R17 94W; 225/45 R18; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 | 215/65 R16 |
| Wheel rims size: | 7J x 16; 7J x 17; 7.5J x 17; 8J x 17; 7.5J x 18; 8J x 18 | 7.5J x 17; 8J x 18; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 | R16 |