1981 BMW 745 vs. 2004 Kia Optima
To start off, 2004 Kia Optima is newer by 23 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 115 more horse power than 2004 Kia Optima. (137 HP @ 4000 RPM). In normal driving conditions, 1981 BMW 745 should accelerate faster than 2004 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 102 kg more than 2004 Kia Optima. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1981 BMW 745 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 1981 BMW 745. However, in wet, icy, snow, or gravel driving conditions, 2004 Kia Optima, 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, 1981 BMW 745 (380 Nm) has 181 more torque (in Nm) than 2004 Kia Optima. (199 Nm). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 2004 Kia Optima.
Compare all specifications:
| 1981 BMW 745 | 2004 Kia Optima | |
| Make | BMW | Kia |
| Model | 745 | Optima |
| Year Released | 1981 | 2004 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3430 cc | 2360 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 252 HP | 137 HP |
| Engine RPM | 5200 RPM | 4000 RPM |
| Torque | 380 Nm | 199 Nm |
| Engine Bore Size | 92 mm | 87.1 mm |
| Engine Stroke Size | 86 mm | 100 mm |
| Engine Compression Ratio | 8.0:1 | 10.0:1 |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1590 kg | 1488 kg |
| Vehicle Length | 4870 mm | 4730 mm |
| Vehicle Width | 1810 mm | 1820 mm |
| Vehicle Height | 1440 mm | 1420 mm |
| Wheelbase Size | 2800 mm | 2710 mm |
| Fuel Tank Capacity | 100 L | 65 L |
