Comparison Alfa Romeo Giulietta (Type 940) 1.6 JTDM (105 Hp) Start&Stop & BMW Z8 (E52) 4.9 (400 Hp) & BMW X6 (E71 facelift 2012) 50i (407 Hp) xDrive Steptronic
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| Brand: | Alfa Romeo | BMW | BMW |
| Model: | Giulietta | Z8 | X6 |
| Generation: | Giulietta (Type 940) | Z8 (E52) | X6 (E71 facelift 2012) |
| Engine / modification: | 1.6 JTDM (105 Hp) Start&Stop | 4.9 (400 Hp) | 50i (407 Hp) xDrive Steptronic |
| Production start: | 2010 year | 2000 year | 2012 year |
| Production end: | 2015 year | 2005 year | 2014 year |
| Coupe type: | Hatchback | Cabriolet | SUV |
| Num. of Doors: | 5 | 2 | 5 |
| Num. of seats: | 5 | 2 | 4-5 |
| Fuel consumption / economy - urban: | 5.5 l/100 km | 21.1 l/100 km | 17.5 l/100 km |
| Fuel consumption / economy - extra urban: | 3.7 l/100 km | 10.6 l/100 km | 9.6 l/100 km |
| Fuel consumption / economy - combined: | 4.4 l/100 km | 14.5 l/100 km | 12.5 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.36 | ||
| Fuel tank volume: | 60 l | 73 l | 85 l |
| Emission standard: | Euro 5 | Euro 5 | |
| CO2 emissions: | 114 g/km | 292 g/km | |
| Power: | 105 hp | 400 hp | 407 hp |
| Max power in: | 4000 rpm. | 6600 rpm. | 5500-6400 rpm. |
| Maximum speed: | 185 km/h | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 11.3 sec | 4.7 sec | 5.4 sec |
| Torque: | 280 Nm @ 1500 rpm. | 500 Nm @ 3800 rpm. | 600 Nm @ 1750-4500 rpm. |
| Model Engine: | 940A3000 | S62B50 | N63B44 |
| Engine position: | Front, transverse | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1598 cm3 | 4941 cm3 | 4395 cm3 |
| Engine oil capacity: | 4.2 l | 7.5 l | 9 l |
| Coolant: | 6.8 l | 12.5 l | 17.2 l |
| Fuel System: | Diesel Commonrail | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Twin-power turbo | |
| Position of cylinders: | Inline | V engine | V engine |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 4 | 8 | 8 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 16.5 | 11 | 10 |
| Piston Stroke: | 80.5 mm | 89 mm | 88.3 mm |
| Cylinder Bore: | 79.5 mm | 94 mm | 89 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 3 | 8 Steptronic | |
| Number of Gears (manual transmission): | 6 | 6 | |
| Length: | 4351 mm | 4400 mm | 4877 mm |
| Width: | 1798 mm | 1830 mm | 1983 mm |
| Height: | 1465 mm | 1317 mm | 1690 mm |
| Wheelbase: | 2634 mm | 2505 mm | 2933 mm |
| Front track: | 1554 mm | 1550 mm | 1644 mm |
| Rear (Back) track: | 1554 mm | 1570 mm | 1706 mm |
| Ride height(clearance): | 212 mm | ||
| Approach angle: | 25.1 ° | ||
| Departure angle: | 25.5 ° | ||
| Ramp angle: | 19.1 ° | ||
| Minimum volume of Luggage (trunk): | 350 l | 203 l | 570 l |
| Maximum amount of Luggage (trunk): | 1450 l | ||
| Front suspension: | McPherson | The depreciated rack | Double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Helical spring | Multi-link independent |
| Max weight: | 1815 kg | 1900 kg | 2790 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc | Ventilated discs |
| Kerb Weight: | 1395 kg | 1660 kg | 2190 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | |
| Max. roof load: | 100 kg | ||
| Minimum turning circle (turning diameter): | 10.9 m | 12.8 m | |
| Permitted trailer load with brakes (12%): | 2700 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 120 kg | ||
| Tire size: | 225/45 R17 91W | 245/45 R18; 275/40 R18 | 255/50 R19 107V XL |
| Wheel rims size: | 7.5J x 17 | R18 | 9J x 19 |