Comparison Fiat Siena (178) 1.7 TD (69 Hp) & BMW 4 Series Gran Coupe (F36) 428i (245 Hp) Steptronic
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| Brand: | Fiat | BMW |
| Model: | Siena | 4 Series |
| Generation: | Siena (178) | 4 Series Gran Coupe (F36) |
| Engine / modification: | 1.7 TD (69 Hp) | 428i (245 Hp) Steptronic |
| Production start: | 1996 year | 2014 year |
| Production end: | 2016 year | |
| Coupe type: | Sedan | Coupe |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 8.2 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.2 l/100 km | |
| Fuel consumption / economy - combined: | 6.3 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | |
| Fuel tank volume: | 48 l | 60 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 147 g/km | |
| Power: | 69 hp | 245 hp |
| Max power in: | 4500 rpm. | 5000-6500 rpm. |
| Maximum speed: | 164 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 14.8 sec | 6.0 sec |
| Torque: | 134 Nm/2500 rpm. | 350 Nm @ 1250-4800 rpm. |
| Model Engine: | N20B20 | |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1698 cm3 | 1997 cm3 |
| Engine oil capacity: | 5.0 l | |
| Coolant: | 7.6 l | |
| Fuel System: | Diesel - Standard diesel injection (SDI) | Direct injection |
| Aspiration / Turbine: | Turbocharging | Twin-power turbo |
| Position of cylinders: | Inline | Inline |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 2 | 4 |
| Compression ratio: | 20.3 | 10 |
| Piston Stroke: | 79.2 mm | 90.1 mm |
| Cylinder Bore: | 82.6 mm | 84 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 8 Steptronic |
| Number of Gears (manual transmission): | 5 | 6 |
| Length: | 4100 mm | 4638 mm |
| Width: | 1614 mm | 1825 mm |
| Height: | 1445 mm | 1389 mm |
| Wheelbase: | 2360 mm | 2810 mm |
| Front track: | 1388 mm | 1545 mm |
| Rear (Back) track: | 1378 mm | 1594 mm |
| Ride height(clearance): | 130 mm | |
| Minimum volume of Luggage (trunk): | 500 l | 480 l |
| Maximum amount of Luggage (trunk): | 850 l | 1300 l |
| Front suspension: | Helical spring | Independent, spring |
| Rear suspension: | Helical spring | Multi-link independent |
| Max weight: | 1560 kg | 2090 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Drum | Ventilated discs |
| Kerb Weight: | 1070 kg | 1530 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.3 m | |
| Permitted trailer load with brakes (12%): | 1600 kg | |
| Permitted trailer load without brakes: | 745 kg | |
| Permitted towbar download: | 75 kg | |
| Tire size: | 175/65 R14 | 225/50 R17 94W |
| Wheel rims size: | 7.5J x 17 |