2003 BMW 645 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 4 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, 2007 BMW Z4 (335 HP @ 7900 RPM) has 14 more horse power than 2003 BMW 645. (321 HP @ 6100 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 605 kg more than 2007 BMW Z4.
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 135 more torque (in Nm) than 2007 BMW Z4. (315 Nm @ 2750 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2003 BMW 645 has automatic transmission and 2007 BMW Z4 has manual transmission. 2007 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
2003 BMW 645 | 2007 BMW Z4 | |
Make | BMW | BMW |
Model | 645 | Z4 |
Year Released | 2003 | 2007 |
Body Type | Convertible | Convertible |
Engine Position | Front | Front |
Engine Size | 4398 cc | 2979 cc |
Engine Cylinders | 8 cylinders | 6 cylinders |
Engine Type | V | in-line |
Valves per Cylinder | 4 valves | 4 valves |
Horse Power | 321 HP | 335 HP |
Engine RPM | 6100 RPM | 7900 RPM |
Torque | 450 Nm | 315 Nm |
Torque RPM | 3600 RPM | 2750 RPM |
Engine Bore Size | 92 mm | 87 mm |
Engine Stroke Size | 82.7 mm | 91 mm |
Top Speed | 250 km/hour | 250 km/hour |
Acceleration 0-100mph | 6.2 seconds | 5.9 seconds |
Drive Type | Rear | Rear |
Transmission Type | Automatic | Manual |
Number of Seats | 4 seats | 2 seats |
Number of Doors | 2 doors | 2 doors |
Vehicle Weight | 1895 kg | 1290 kg |
Vehicle Length | 4830 mm | 4100 mm |
Vehicle Width | 1860 mm | 1790 mm |
Vehicle Height | 1380 mm | 1310 mm |
Wheelbase Size | 2790 mm | 2500 mm |
Fuel Consumption Overall | 11.5 L/100km | 9.1 L/100km |
Fuel Tank Capacity | 70 L | 55 L |