When choosing the 4 WD vehicles, the engine type is one of the most important to decide first. There are three things to consider in choosing the engine:
1. Petrol or Diesel engine?
2. Engine capacity and engine output (in this case are power and torque).
3. Where do you live, is in country with good quality fuel or in the country that most of the fuel are contaminated.
4. What the main use of your 4WD, long distance trip? Camping? Soft off-roader? Hard off-roader, rock crawling? City slicker?
The ideal powerplant for an off-roader is able to produce its power at low RPM. Engines that do this can be driven in higher gear ratios in difficult terrain which is advantageous because the higher the gear ratio, the less chance of wheel-spin and the more delicately the driver can control the engine’s power output. Engines designed with long piston strokes tend to do this.
Good off-road driving technique calls for selecting the right gear for the conditions. If the gear ratio selected is too high, a more powerful engine may still have the torque to get through, but if the gear selected is too low, a big engine could, if not handled skilfully, cause excessive wheel-spin and bogging down. For a novice driver therefore, high power is often a disadvantage. For long distance travel, larger engines are more reliable than small ones because they rev slower – but the penalty comes in higher fuel consumption.
1. Petrol or Diesel engine?
2. Engine capacity and engine output (in this case are power and torque).
3. Where do you live, is in country with good quality fuel or in the country that most of the fuel are contaminated.
4. What the main use of your 4WD, long distance trip? Camping? Soft off-roader? Hard off-roader, rock crawling? City slicker?
The ideal powerplant for an off-roader is able to produce its power at low RPM. Engines that do this can be driven in higher gear ratios in difficult terrain which is advantageous because the higher the gear ratio, the less chance of wheel-spin and the more delicately the driver can control the engine’s power output. Engines designed with long piston strokes tend to do this.
Good off-road driving technique calls for selecting the right gear for the conditions. If the gear ratio selected is too high, a more powerful engine may still have the torque to get through, but if the gear selected is too low, a big engine could, if not handled skilfully, cause excessive wheel-spin and bogging down. For a novice driver therefore, high power is often a disadvantage. For long distance travel, larger engines are more reliable than small ones because they rev slower – but the penalty comes in higher fuel consumption.
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