2007 BMW M5 vs. 1991 BMW Z1
To start off, 2007 BMW M5 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 BMW Z1. In addition, the cost of maintenance, including insurance, on 1991 BMW Z1 would be higher. At 4,998 cc (10 cylinders), 2007 BMW M5 is equipped with a bigger engine. In terms of performance, 2007 BMW M5 (500 HP @ 7750 RPM) has 325 more horse power than 1991 BMW Z1. (175 HP @ 5800 RPM). In normal driving conditions, 2007 BMW M5 should accelerate faster than 1991 BMW Z1. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW M5 weights approximately 580 kg more than 1991 BMW Z1. 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, 2007 BMW M5 (520 Nm @ 6100 RPM) has 290 more torque (in Nm) than 1991 BMW Z1. (230 Nm @ 4000 RPM). This means 2007 BMW M5 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW Z1. 2007 BMW M5 has automatic transmission and 1991 BMW Z1 has manual transmission. 1991 BMW Z1 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW M5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW M5 | 1991 BMW Z1 | |
| Make | BMW | BMW |
| Model | M5 | Z1 |
| Year Released | 2007 | 1991 |
| Body Type | Sedan | Roadster |
| Engine Position | Front | Front |
| Engine Size | 4998 cc | 2497 cc |
| Engine Cylinders | 10 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 500 HP | 175 HP |
| Engine RPM | 7750 RPM | 5800 RPM |
| Torque | 520 Nm | 230 Nm |
| Torque RPM | 6100 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 82 mm |
| Engine Stroke Size | 75.2 mm | 78.8 mm |
| Engine Compression Ratio | 12.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 1830 kg | 1250 kg |
| Vehicle Length | 4860 mm | 3960 mm |
| Vehicle Width | 1850 mm | 1810 mm |
| Vehicle Height | 1480 mm | 1280 mm |
| Wheelbase Size | 2900 mm | 2450 mm |
