1981 BMW 745 vs. 1998 Daihatsu Sirion
To start off, 1998 Daihatsu Sirion is newer by 17 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 3,430 cc (6 cylinders), 1981 BMW 745 is equipped with a bigger engine. In terms of performance, 1981 BMW 745 (252 HP @ 5200 RPM) has 152 more horse power than 1998 Daihatsu Sirion. (100 HP @ 7000 RPM). In normal driving conditions, 1981 BMW 745 should accelerate faster than 1998 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 690 kg more than 1998 Daihatsu Sirion. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1998 Daihatsu Sirion is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 745. In wet, icy, snow, or gravel driving conditions, 1998 Daihatsu Sirion will offer significantly more control. 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, 1981 BMW 745 (380 Nm @ 2200 RPM) has 260 more torque (in Nm) than 1998 Daihatsu Sirion. (120 Nm @ 4400 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 1998 Daihatsu Sirion.
Compare all specifications:
| 1981 BMW 745 | 1998 Daihatsu Sirion | |
| Make | BMW | Daihatsu |
| Model | 745 | Sirion |
| Year Released | 1981 | 1998 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3430 cc | 1298 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 252 HP | 100 HP |
| Engine RPM | 5200 RPM | 7000 RPM |
| Torque | 380 Nm | 120 Nm |
| Torque RPM | 2200 RPM | 4400 RPM |
| Engine Bore Size | 92 mm | 72 mm |
| Engine Stroke Size | 86 mm | 79.7 mm |
| Engine Compression Ratio | 8.0:1 | 11.0:1 |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1590 kg | 900 kg |
| Vehicle Length | 4870 mm | 3680 mm |
| Vehicle Width | 1810 mm | 1600 mm |
| Vehicle Height | 1440 mm | 1460 mm |
| Wheelbase Size | 2800 mm | 2350 mm |
| Fuel Tank Capacity | 100 L | 37 L |
