2008 BMW Z4 vs. 2007 Daihatsu Sirion
To start off, 2008 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Daihatsu Sirion. In addition, the cost of maintenance, including insurance, on 2007 Daihatsu Sirion would be higher. At 2,496 cc (6 cylinders), 2008 BMW Z4 is equipped with a bigger engine. In terms of performance, 2008 BMW Z4 (215 HP @ 6500 RPM) has 146 more horse power than 2007 Daihatsu Sirion. (69 HP @ 6000 RPM). In normal driving conditions, 2008 BMW Z4 should accelerate faster than 2007 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW Z4 weights approximately 466 kg more than 2007 Daihatsu Sirion. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 BMW Z4 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2008 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2007 Daihatsu Sirion, being front wheel drive (FWD), will offer much better control with better grip. 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 BMW Z4 (250 Nm @ 2750 RPM) has 156 more torque (in Nm) than 2007 Daihatsu Sirion. (94 Nm @ 3600 RPM). This means 2008 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2007 Daihatsu Sirion.
Compare all specifications:
| 2008 BMW Z4 | 2007 Daihatsu Sirion | |
| Make | BMW | Daihatsu |
| Model | Z4 | Sirion |
| Year Released | 2008 | 2007 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2496 cc | 998 cc |
| Engine Cylinders | 6 cylinders | 3 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 69 HP |
| Engine RPM | 6500 RPM | 6000 RPM |
| Torque | 250 Nm | 94 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Bore Size | 82 mm | 71 mm |
| Engine Stroke Size | 78.8 mm | 84 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 240 km/hour | 160 km/hour |
| Acceleration 0-100mph | 7 seconds | 13.9 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1360 kg | 894 kg |
| Vehicle Length | 4100 mm | 3610 mm |
| Vehicle Width | 1790 mm | 1670 mm |
| Vehicle Height | 1310 mm | 1560 mm |
| Wheelbase Size | 2500 mm | 2440 mm |
| Fuel Consumption Overall | 8.4 L/100km | 5 L/100km |
| Fuel Tank Capacity | 55 L | 40 L |
