2008 BMW 523 vs. 2006 BMW Z4
To start off, 2008 BMW 523 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 2,497 cc (6 cylinders), 2008 BMW 523 is equipped with a bigger engine. In terms of performance, 2008 BMW 523 (175 HP @ 5800 RPM) has 27 more horse power than 2006 BMW Z4. (148 HP @ 6200 RPM). In normal driving conditions, 2008 BMW 523 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 523 weights approximately 164 kg more than 2006 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, 2008 BMW 523 (230 Nm @ 3500 RPM) has 30 more torque (in Nm) than 2006 BMW Z4. (200 Nm @ 3600 RPM). This means 2008 BMW 523 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2008 BMW 523 | 2006 BMW Z4 | |
| Make | BMW | BMW |
| Model | 523 | Z4 |
| Year Released | 2008 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 148 HP |
| Engine RPM | 5800 RPM | 6200 RPM |
| Torque | 230 Nm | 200 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 82.1 mm | 84 mm |
| Engine Stroke Size | 78.8 mm | 90 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Acceleration 0-100mph | 8.5 seconds | 8.2 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1490 kg | 1326 kg |
| Vehicle Length | 4870 mm | 4100 mm |
| Vehicle Height | 1420 mm | 1310 mm |
| Wheelbase Size | 2890 mm | 2500 mm |
| Fuel Consumption Overall | 8.5 L/100km | 7.5 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
