2003 BMW 645 vs. 2006 BMW Z4
To start off, 2006 BMW Z4 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (325 HP @ 6100 RPM) has 97 more horse power than 2006 BMW Z4. (228 HP @ 5900 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 325 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 149 more torque (in Nm) than 2006 BMW Z4. (301 Nm @ 3500 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
2003 BMW 645 | 2006 BMW Z4 | |
Make | BMW | BMW |
Model | 645 | Z4 |
Year Released | 2003 | 2006 |
Body Type | Coupe | Convertible |
Engine Position | Front | Front |
Engine Size | 4398 cc | 2979 cc |
Engine Cylinders | 8 cylinders | 6 cylinders |
Engine Type | V | in-line |
Horse Power | 325 HP | 228 HP |
Engine RPM | 6100 RPM | 5900 RPM |
Torque | 450 Nm | 301 Nm |
Torque RPM | 3600 RPM | 3500 RPM |
Engine Bore Size | 92 mm | 84 mm |
Engine Stroke Size | 82.7 mm | 89.6 mm |
Top Speed | 250 km/hour | 250 km/hour |
Acceleration 0-100mph | 5.9 seconds | 5.9 seconds |
Drive Type | Rear | Rear |
Number of Seats | 4 seats | 2 seats |
Number of Doors | 2 doors | 2 doors |
Vehicle Weight | 1690 kg | 1365 kg |
Vehicle Length | 4830 mm | 4100 mm |
Vehicle Width | 1860 mm | 1790 mm |
Vehicle Height | 1380 mm | 1310 mm |
Wheelbase Size | 2890 mm | 2500 mm |
Fuel Consumption Highway | 8.6 L/100km | 7.8 L/100km |
Fuel Consumption City | 17.2 L/100km | 11.8 L/100km |
Fuel Consumption Overall | 11.7 L/100km | 9.1 L/100km |
Fuel Tank Capacity | 70 L | 55 L |