1991 BMW Z1 vs. 2007 Saab 05-Sep
To start off, 2007 Saab 05-Sep 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 2,497 cc (6 cylinders), 1991 BMW Z1 is equipped with a bigger engine. In terms of performance, 2007 Saab 05-Sep (256 HP @ 5300 RPM) has 81 more horse power than 1991 BMW Z1. (175 HP @ 5800 RPM) In normal driving conditions, 2007 Saab 05-Sep should accelerate faster than 1991 BMW Z1. With that said, vehicle weight also plays an important factor in acceleration. 2007 Saab 05-Sep weights approximately 435 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.
Because 1991 BMW Z1 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1991 BMW Z1. However, in wet, icy, snow, or gravel driving conditions, 2007 Saab 05-Sep, being front wheel drive (FWD), will offer much better control with better grip. 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 Saab 05-Sep (350 Nm @ 1900 RPM) has 120 more torque (in Nm) than 1991 BMW Z1. (230 Nm @ 4000 RPM). This means 2007 Saab 05-Sep will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW Z1.
Compare all specifications:
| 1991 BMW Z1 | 2007 Saab 05-Sep | |
| Make | BMW | Saab |
| Model | Z1 | 05-Sep |
| Year Released | 1991 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2290 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 175 HP | 256 HP |
| Engine RPM | 5800 RPM | 5300 RPM |
| Torque | 230 Nm | 350 Nm |
| Torque RPM | 4000 RPM | 1900 RPM |
| Engine Bore Size | 82 mm | 90.1 mm |
| Engine Stroke Size | 78.8 mm | 90 mm |
| Engine Compression Ratio | 11.0:1 | 9.3:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 1250 kg | 1685 kg |
| Vehicle Length | 3960 mm | 4840 mm |
| Vehicle Width | 1810 mm | 1800 mm |
| Vehicle Height | 1280 mm | 1470 mm |
| Wheelbase Size | 2450 mm | 2710 mm |
