2002 BMW Z4 vs. 2003 Opel Speedster
To start off, 2003 Opel Speedster 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 2,494 cc (6 cylinders), 2002 BMW Z4 is equipped with a bigger engine. In terms of performance, 2003 Opel Speedster (197 HP @ 5500 RPM) has 4 more horse power than 2002 BMW Z4. (193 HP @ 6000 RPM) In normal driving conditions, 2003 Opel Speedster should accelerate faster than 2002 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2002 BMW Z4 weights approximately 360 kg more than 2003 Opel Speedster.
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 Opel Speedster (250 Nm @ 1950 RPM) has 5 more torque (in Nm) than 2002 BMW Z4. (245 Nm @ 3500 RPM). This means 2003 Opel Speedster will have an easier job in driving up hills or pulling heavy equipment than 2002 BMW Z4. 2002 BMW Z4 has automatic transmission and 2003 Opel Speedster has manual transmission. 2003 Opel Speedster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2002 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2002 BMW Z4 | 2003 Opel Speedster | |
| Make | BMW | Opel |
| Model | Z4 | Speedster |
| Year Released | 2002 | 2003 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Middle |
| Engine Size | 2494 cc | 1993 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 193 HP | 197 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 245 Nm | 250 Nm |
| Torque RPM | 3500 RPM | 1950 RPM |
| Engine Bore Size | 84 mm | 86 mm |
| Engine Stroke Size | 75 mm | 86 mm |
| Engine Compression Ratio | 10.5:1 | 8.8:1 |
| Top Speed | 227 km/hour | 243 km/hour |
| Acceleration 0-100mph | 7.8 seconds | 4.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1365 kg | 1005 kg |
| Vehicle Length | 4100 mm | 3790 mm |
| Vehicle Width | 1790 mm | 1710 mm |
| Vehicle Height | 1310 mm | 1120 mm |
| Wheelbase Size | 2450 mm | 2400 mm |
| Fuel Consumption Highway | 7.3 L/100km | 6.5 L/100km |
| Fuel Consumption City | 13.5 L/100km | 11.9 L/100km |
| Fuel Consumption Overall | 9.5 L/100km | 8.5 L/100km |
| Fuel Tank Capacity | 55 L | 36 L |
