2006 BMW Z4 vs. 2000 Caterham 21
To start off, 2006 BMW Z4 is newer by 6 year(s). Which means there will be less support and parts availability for 2000 Caterham 21. In addition, the cost of maintenance, including insurance, on 2000 Caterham 21 would be higher. At 2,492 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2000 Caterham 21 (230 HP @ 8600 RPM) has 41 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2000 Caterham 21 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW Z4 weights approximately 795 kg more than 2000 Caterham 21.
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, 2006 BMW Z4 (245 Nm @ 3500 RPM) has 35 more torque (in Nm) than 2000 Caterham 21. (210 Nm @ 7200 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2000 Caterham 21.
Compare all specifications:
| 2006 BMW Z4 | 2000 Caterham 21 | |
| Make | BMW | Caterham |
| Model | Z4 | 21 |
| Year Released | 2006 | 2000 |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 1794 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 189 HP | 230 HP |
| Engine RPM | 6000 RPM | 8600 RPM |
| Torque | 245 Nm | 210 Nm |
| Torque RPM | 3500 RPM | 7200 RPM |
| Engine Bore Size | 84 mm | 80 mm |
| Engine Stroke Size | 75 mm | 89.3 mm |
| Engine Compression Ratio | 11.0:1 | 11.5:1 |
| Top Speed | 235 km/hour | 241 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1335 kg | 540 kg |
| Vehicle Length | 4100 mm | 3860 mm |
| Vehicle Width | 1790 mm | 1590 mm |
| Wheelbase Size | 2500 mm | 2230 mm |
| Fuel Tank Capacity | 55 L | 100 L |
