2003 Alpina Roadster vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2003 Alpina Roadster would be higher. At 3,346 cc (6 cylinders), 2003 Alpina Roadster is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (335 HP @ 7900 RPM) has 34 more horse power than 2003 Alpina Roadster. (301 HP @ 6300 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2003 Alpina Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alpina Roadster weights approximately 316 kg more than 2007 BMW Z4.
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, 2003 Alpina Roadster (362 Nm @ 4800 RPM) has 47 more torque (in Nm) than 2007 BMW Z4. (315 Nm @ 2750 RPM). This means 2003 Alpina Roadster will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2007 BMW Z4 has automatic transmission and 2003 Alpina Roadster has manual transmission. 2003 Alpina Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Alpina Roadster | 2007 BMW Z4 | |
| Make | Alpina | BMW |
| Model | Roadster | Z4 |
| Year Released | 2003 | 2007 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 2996 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 301 HP | 335 HP |
| Engine RPM | 6300 RPM | 7900 RPM |
| Torque | 362 Nm | 315 Nm |
| Torque RPM | 4800 RPM | 2750 RPM |
| Engine Compression Ratio | 10.0:1 | 11.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Acceleration 0-100mph | 5.4 seconds | 6.2 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1626 kg | 1310 kg |
| Vehicle Length | 4100 mm | 4100 mm |
| Vehicle Width | 1790 mm | 1790 mm |
| Vehicle Height | 1310 mm | 1310 mm |
| Wheelbase Size | 2500 mm | 2500 mm |
| Fuel Consumption Overall | 11.7 L/100km | 9.5 L/100km |
| Fuel Tank Capacity | 55 L | 55 L |
