2007 BMW Z4 vs. 1991 Porsche 928
To start off, 2007 BMW Z4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Porsche 928. In addition, the cost of maintenance, including insurance, on 1991 Porsche 928 would be higher. At 4,663 cc (8 cylinders), 1991 Porsche 928 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (358 HP @ 7900 RPM) has 52 more horse power than 1991 Porsche 928. (306 HP @ 5900 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 1991 Porsche 928.
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 Porsche 928 (408 Nm @ 4100 RPM) has 23 more torque (in Nm) than 2007 BMW Z4. (385 Nm @ 4900 RPM). This means 1991 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2007 BMW Z4 | 1991 Porsche 928 | |
| Make | BMW | Porsche |
| Model | Z4 | 928 |
| Year Released | 2007 | 1991 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3199 cc | 4663 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 358 HP | 306 HP |
| Engine RPM | 7900 RPM | 5900 RPM |
| Torque | 385 Nm | 408 Nm |
| Torque RPM | 4900 RPM | 4100 RPM |
| Engine Compression Ratio | 11.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 273 km/hour | 319 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Length | 4100 mm | 4530 mm |
| Vehicle Width | 1790 mm | 2060 mm |
| Vehicle Height | 1300 mm | 1290 mm |
| Wheelbase Size | 2500 mm | 2510 mm |
