2006 BMW 630 vs. 2005 BMW Z4
To start off, 2006 BMW 630 is newer by 1 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 2,996 cc (6 cylinders), 2006 BMW 630 is equipped with a bigger engine. In terms of performance, 2006 BMW 630 (254 HP @ 6600 RPM) has 70 more horse power than 2005 BMW Z4. (184 HP @ 6100 RPM). In normal driving conditions, 2006 BMW 630 should accelerate faster than 2005 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 630 weights approximately 365 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, 2006 BMW 630 (300 Nm @ 2500 RPM) has 63 more torque (in Nm) than 2005 BMW Z4. (237 Nm @ 3500 RPM). This means 2006 BMW 630 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW Z4. 2005 BMW Z4 has automatic transmission and 2006 BMW 630 has manual transmission. 2006 BMW 630 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 630 | 2005 BMW Z4 | |
| Make | BMW | BMW |
| Model | 630 | Z4 |
| Year Released | 2006 | 2005 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 2489 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 254 HP | 184 HP |
| Engine RPM | 6600 RPM | 6100 RPM |
| Torque | 300 Nm | 237 Nm |
| Torque RPM | 2500 RPM | 3500 RPM |
| Engine Bore Size | 85 mm | 84 mm |
| Engine Stroke Size | 88 mm | 75 mm |
| Engine Compression Ratio | 10.7:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 235 km/hour |
| Acceleration 0-100mph | 7.2 seconds | 7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1760 kg | 1395 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 | 9.6 L/100km | 9 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
