2009 Lexus IS vs. 2005 BMW 645
To start off, 2009 Lexus IS is newer by 4 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 would be higher. At 4,390 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (338 HP @ 6100 RPM) has 134 more horse power than 2009 Lexus IS. (204 HP @ 6400 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2009 Lexus IS. With that said, vehicle weight also plays an important factor in acceleration. 2009 Lexus IS weights approximately 50 kg more than 2005 BMW 645.
Because 2009 Lexus IS is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW 645. In wet, icy, snow, or gravel driving conditions, 2009 Lexus IS 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, 2005 BMW 645 (439 Nm @ 3600 RPM) has 188 more torque (in Nm) than 2009 Lexus IS. (251 Nm @ 4800 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2009 Lexus IS.
Compare all specifications:
| 2009 Lexus IS | 2005 BMW 645 | |
| Make | Lexus | BMW |
| Model | IS | 645 |
| Year Released | 2009 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2499 cc | 4390 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 204 HP | 338 HP |
| Engine RPM | 6400 RPM | 6100 RPM |
| Torque | 251 Nm | 439 Nm |
| Torque RPM | 4800 RPM | 3600 RPM |
| Engine Bore Size | 83 mm | 92 mm |
| Engine Stroke Size | 77 mm | 83 mm |
| Engine Compression Ratio | 12.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1765 kg | 1715 kg |
| Vehicle Length | 4590 mm | 4830 mm |
| Vehicle Width | 1810 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2740 mm | 2790 mm |
| Fuel Consumption | 9.1 L/100km | 9.4 L/100km |
| Fuel Consumption City | 11.8 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 10.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 65 L | 70 L |
