2005 BMW Z4 vs. 2008 BMW 523
To start off, 2008 BMW 523 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW Z4. In addition, the cost of maintenance, including insurance, on 2005 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 34 more horse power than 2005 BMW Z4. (141 HP @ 6200 RPM) In normal driving conditions, 2008 BMW 523 should accelerate faster than 2005 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 523 weights approximately 165 kg more than 2005 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 2005 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 2005 BMW Z4.
Compare all specifications:
| 2005 BMW Z4 | 2008 BMW 523 | |
| Make | BMW | BMW |
| Model | Z4 | 523 |
| Year Released | 2005 | 2008 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 2497 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 141 HP | 175 HP |
| Engine RPM | 6200 RPM | 5800 RPM |
| Torque | 200 Nm | 230 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 78.8 mm |
| Engine Stroke Size | 90 mm | 82 mm |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 220 km/hour | 230 km/hour |
| Acceleration 0-100mph | 8.2 seconds | 9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1325 kg | 1490 kg |
| Vehicle Length | 4100 mm | 4850 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2500 mm | 2890 mm |
| Fuel Consumption Overall | 7.7 L/100km | 11.1 L/100km |
| Fuel Tank Capacity | 55 L | 70 L |
