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 (335 HP @ 5900 RPM) has 150 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. 2011 BMW Z4 weights approximately 10 kg more than 1991 BMW 730. 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, 2011 BMW Z4 (450 Nm @ 1500 RPM) has 190 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. 2011 BMW Z4 has automatic transmission and 1991 BMW 730 has manual transmission. 1991 BMW 730 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2011 BMW Z4 will be easier to drive especially in heavy traffic.
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 | 335 HP |
| Engine RPM | 5800 RPM | 5900 RPM |
| Torque | 260 Nm | 450 Nm |
| Torque RPM | 4000 RPM | 1500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | 7-speed automated manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1600 kg | 1610 kg |
| Vehicle Length | 4920 mm | 4242 mm |
| Vehicle Width | 1850 mm | 1791 mm |
| Vehicle Height | 1420 mm | 1285 mm |
| Wheelbase Size | 2840 mm | 2497 mm |
| Fuel Tank Capacity | 90 L | 55 L |
