2008 Daihatsu Sirion vs. 2006 BMW Z4
To start off, 2008 Daihatsu Sirion is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW Z4. In addition, the cost of maintenance, including insurance, on 2006 BMW Z4 would be higher. At 2,170 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (168 HP @ 6250 RPM) has 67 more horse power than 2008 Daihatsu Sirion. (101 HP @ 7000 RPM) In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2008 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW Z4 weights approximately 505 kg more than 2008 Daihatsu Sirion. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 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 2006 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2008 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, 2006 BMW Z4 (210 Nm @ 3500 RPM) has 90 more torque (in Nm) than 2008 Daihatsu Sirion. (120 Nm @ 4400 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2008 Daihatsu Sirion.
Compare all specifications:
| 2008 Daihatsu Sirion | 2006 BMW Z4 | |
| Make | Daihatsu | BMW |
| Model | Sirion | Z4 |
| Year Released | 2008 | 2006 |
| Body Type | Hatchback | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1298 cc | 2170 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 101 HP | 168 HP |
| Engine RPM | 7000 RPM | 6250 RPM |
| Torque | 120 Nm | 210 Nm |
| Torque RPM | 4400 RPM | 3500 RPM |
| Engine Bore Size | 72 mm | 80 mm |
| Engine Stroke Size | 79.7 mm | 72 mm |
| Engine Compression Ratio | 11.0:1 | 10.8:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 190 km/hour | 225 km/hour |
| Acceleration 0-100mph | 10.5 seconds | 7.7 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 820 kg | 1325 kg |
| Vehicle Length | 3700 mm | 4100 mm |
| Vehicle Width | 1600 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1310 mm |
| Wheelbase Size | 2350 mm | 2500 mm |
| Fuel Consumption Overall | 8.9 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 40 L | 55 L |
