2008 Alpina B5 vs. 2006 BMW Z4
To start off, 2008 Alpina B5 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW Z4. In addition, the cost of maintenance, including insurance, on 2006 BMW Z4 would be higher. At 4,398 cc (8 cylinders), 2008 Alpina B5 is equipped with a bigger engine. In terms of performance, 2008 Alpina B5 (493 HP @ 5500 RPM) has 304 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM). In normal driving conditions, 2008 Alpina B5 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Alpina B5 weights approximately 385 kg more than 2006 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2008 Alpina B5 (700 Nm @ 4250 RPM) has 455 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2008 Alpina B5 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2008 Alpina B5 has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Alpina B5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Alpina B5 | 2006 BMW Z4 | |
| Make | Alpina | BMW |
| Model | B5 | Z4 |
| Year Released | 2008 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2492 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 493 HP | 189 HP |
| Engine RPM | 5500 RPM | 6000 RPM |
| Torque | 700 Nm | 245 Nm |
| Torque RPM | 4250 RPM | 3500 RPM |
| Engine Bore Size | 92 mm | 84 mm |
| Engine Stroke Size | 82.7 mm | 75 mm |
| Engine Compression Ratio | 9.0:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 314 km/hour | 235 km/hour |
| Acceleration 0-100mph | 4.7 seconds | 7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1720 kg | 1335 kg |
| Vehicle Length | 4850 mm | 4100 mm |
| Vehicle Width | 1850 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1310 mm |
| Wheelbase Size | 2890 mm | 2500 mm |
| Fuel Consumption Overall | 12.3 L/100km | 9 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
