1991 BMW 730 vs. 2011 BMW Z4
To start off, 2011 BMW Z4 is newer by 20 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 3,000 cc (6 cylinders), 2011 BMW Z4 is equipped with a bigger engine. In terms of performance, 2011 BMW Z4 (300 HP @ 5800 RPM) has 115 more horse power than 1991 BMW 730. (185 HP @ 5800 RPM) In normal driving conditions, 2011 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 10 kg more than 2011 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, 2011 BMW Z4 (406 Nm @ 1400 RPM) has 146 more torque (in Nm) than 1991 BMW 730. (260 Nm @ 4000 RPM). This means 2011 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 730.
Compare all specifications:
| 1991 BMW 730 | 2011 BMW Z4 | |
| Make | BMW | BMW |
| Model | 730 | Z4 |
| Year Released | 1991 | 2011 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2986 cc | 3000 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 185 HP | 300 HP |
| Engine RPM | 5800 RPM | 5800 RPM |
| Torque | 260 Nm | 406 Nm |
| Torque RPM | 4000 RPM | 1400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1600 kg | 1590 kg |
| Vehicle Length | 4920 mm | 4239 mm |
| Vehicle Width | 1850 mm | 1791 mm |
| Vehicle Height | 1420 mm | 1290 mm |
| Wheelbase Size | 2840 mm | 2497 mm |
| Fuel Tank Capacity | 90 L | 55 L |
