Re: How do car manufacturers come up with engine capacities? I would suspect that the engine isn't the first thing they consider. They probably design the look, and then modify it to fit in a decent engine. They're concerned with selling cars at certain price points, and selling the same models for as long as possible. Once they've got the basic look in place, they probably choose their engine based on the amount of performance they need, and the weight and strength of the chassis.
Most cars have different engine options, and are sold globally to very different audiences, and are used in very different conditions. Fuel, top speed, budget, safety, hardiness, weather and reliability are probably some of the factors that could be considered when deciding which engine to stick in which car.
A car manufacturer would spend millions on r&d promoting his new line up, so he'd want to use the same chassis in as many configurations as possible. So he'd want to design a chassis that's visually appealing, roomy and comfortable, stable, tough, and that can be tweaked to accommodate a variety of engine/suspension options.
That's what I'd do anyway, whether car manufacturers do the same I don't know, but I'd suspect they'd probably be thinking along those lines too. |