2003 Alpina Roadster vs. 2002 BMW Z4
To start off, 2003 Alpina Roadster is newer by 1 year(s). Which means there will be less support and parts availability for 2002 BMW Z4. In addition, the cost of maintenance, including insurance, on 2002 BMW Z4 would be higher. At 3,346 cc (6 cylinders), 2003 Alpina Roadster is equipped with a bigger engine. In terms of performance, 2003 Alpina Roadster (301 HP @ 6300 RPM) has 111 more horse power than 2002 BMW Z4. (190 HP @ 6000 RPM). In normal driving conditions, 2003 Alpina Roadster should accelerate faster than 2002 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alpina Roadster weights approximately 231 kg more than 2002 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, 2003 Alpina Roadster (362 Nm @ 4800 RPM) has 117 more torque (in Nm) than 2002 BMW Z4. (245 Nm @ 3500 RPM). This means 2003 Alpina Roadster will have an easier job in driving up hills or pulling heavy equipment than 2002 BMW Z4.
Compare all specifications:
| 2003 Alpina Roadster | 2002 BMW Z4 | |
| Make | Alpina | BMW |
| Model | Roadster | Z4 |
| Year Released | 2003 | 2002 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 2494 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 301 HP | 190 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 362 Nm | 245 Nm |
| Torque RPM | 4800 RPM | 3500 RPM |
| Engine Bore Size | 87 mm | 84 mm |
| Engine Stroke Size | 93.8 mm | 75 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Acceleration 0-100mph | 5.4 seconds | 7.3 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1626 kg | 1395 kg |
| Vehicle Length | 4100 mm | 4100 mm |
| Vehicle Width | 1790 mm | 1790 mm |
| Vehicle Height | 1310 mm | 1310 mm |
| Wheelbase Size | 2500 mm | 2580 mm |
| Fuel Consumption Overall | 11.7 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 55 L | 55 L |
