2004 BMW Z4 vs. 2005 BMW 730
To start off, 2005 BMW 730 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 BMW Z4. In addition, the cost of maintenance, including insurance, on 2004 BMW Z4 would be higher. At 2,977 cc (6 cylinders), 2005 BMW 730 is equipped with a bigger engine. In terms of performance, 2005 BMW 730 (254 HP @ 6600 RPM) has 69 more horse power than 2004 BMW Z4. (185 HP @ 6000 RPM) In normal driving conditions, 2005 BMW 730 should accelerate faster than 2004 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 730 weights approximately 639 kg more than 2004 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, 2005 BMW 730 (300 Nm @ 2500 RPM) has 55 more torque (in Nm) than 2004 BMW Z4. (245 Nm @ 3500 RPM). This means 2005 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW Z4. 2005 BMW 730 has automatic transmission and 2004 BMW Z4 has manual transmission. 2004 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW 730 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 BMW Z4 | 2005 BMW 730 | |
| Make | BMW | BMW |
| Model | Z4 | 730 |
| Year Released | 2004 | 2005 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 2977 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 254 HP |
| Engine RPM | 6000 RPM | 6600 RPM |
| Torque | 245 Nm | 300 Nm |
| Torque RPM | 3500 RPM | 2500 RPM |
| Engine Bore Size | 84 mm | 85 mm |
| Engine Stroke Size | 75 mm | 88 mm |
| Engine Compression Ratio | 11.0:1 | 10.7:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 244 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1296 kg | 1935 kg |
| Vehicle Length | 4100 mm | 5040 mm |
| Vehicle Width | 1790 mm | 1910 mm |
| Vehicle Height | 1300 mm | 1500 mm |
| Wheelbase Size | 2500 mm | 2840 mm |
| Fuel Consumption Highway | 8.4 L/100km | 7.5 L/100km |
| Fuel Consumption City | 11.8 L/100km | 14.6 L/100km |
| Fuel Consumption Overall | 10.2 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 55 L | 88 L |
