2006 BMW Z4 vs. 1991 BMW 730
To start off, 2006 BMW Z4 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 BMW 730. In addition, the cost of maintenance, including insurance, on 1991 BMW 730 would be higher. At 2,986 cc (6 cylinders), 1991 BMW 730 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (189 HP @ 6000 RPM) has 4 more horse power than 1991 BMW 730. (185 HP @ 5800 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 1991 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW 730 weights approximately 265 kg more than 2006 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, 1991 BMW 730 (260 Nm @ 4000 RPM) has 15 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 1991 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
2006 BMW Z4 | 1991 BMW 730 | |
Make | BMW | BMW |
Model | Z4 | 730 |
Year Released | 2006 | 1991 |
Body Type | Convertible | Sedan |
Engine Position | Front | Front |
Engine Size | 2492 cc | 2986 cc |
Engine Cylinders | 6 cylinders | 6 cylinders |
Engine Type | in-line | in-line |
Horse Power | 189 HP | 185 HP |
Engine RPM | 6000 RPM | 5800 RPM |
Torque | 245 Nm | 260 Nm |
Torque RPM | 3500 RPM | 4000 RPM |
Engine Bore Size | 84 mm | 89 mm |
Engine Stroke Size | 75 mm | 80 mm |
Engine Compression Ratio | 11.0:1 | 9.0:1 |
Fuel Type | Gasoline - Premium | Gasoline |
Drive Type | Rear | Rear |
Transmission Type | Manual | Manual |
Number of Seats | 2 seats | 5 seats |
Number of Doors | 2 doors | 4 doors |
Vehicle Weight | 1335 kg | 1600 kg |
Vehicle Length | 4100 mm | 4920 mm |
Vehicle Width | 1790 mm | 1850 mm |
Vehicle Height | 1310 mm | 1420 mm |
Wheelbase Size | 2500 mm | 2840 mm |
Fuel Tank Capacity | 55 L | 90 L |