2006 BMW Z4 vs. 2009 BMW 630
To start off, 2009 BMW 630 is newer by 3 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 2,996 cc (6 cylinders), 2009 BMW 630 is equipped with a bigger engine. In terms of performance, 2009 BMW 630 (268 HP @ 6700 RPM) has 79 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2009 BMW 630 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 630 weights approximately 483 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, 2009 BMW 630 (320 Nm @ 2750 RPM) has 75 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2009 BMW 630 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2009 BMW 630 has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 BMW 630 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2009 BMW 630 | |
| Make | BMW | BMW |
| Model | Z4 | 630 |
| Year Released | 2006 | 2009 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 2996 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 268 HP |
| Engine RPM | 6000 RPM | 6700 RPM |
| Torque | 245 Nm | 320 Nm |
| Torque RPM | 3500 RPM | 2750 RPM |
| Engine Bore Size | 84 mm | 85 mm |
| Engine Stroke Size | 75 mm | 88 mm |
| Engine Compression Ratio | 11.0:1 | 12.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7 seconds | 6.7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1335 kg | 1818 kg |
| Vehicle Length | 4100 mm | 4830 mm |
| Vehicle Width | 1790 mm | 1860 mm |
| Vehicle Height | 1310 mm | 1380 mm |
| Wheelbase Size | 2500 mm | 2790 mm |
| Fuel Consumption Overall | 9 L/100km | 8.3 L/100km |
| Fuel Tank Capacity | 55 L | 70 L |
