India, April 2 -- Be honest now, are you a bit partial to Diet Cola? I am. As much as I like carbonated drinks, truth be told, they are quite sugary and since my body can't get rid of that sugar efficiently enough, the only way to fuel myself is the diet path. But being a diet cola does not mean that there has to be a sacrifice on the taste front. A good diet cola should give you the same satisfaction as the real thing. Now, you must be wondering why any discussion around 350-horsepower cars would have the word 'diet' in it. Both the Audi S5 and the BMW M340i are not the full-fat, fire-breathing ultra sports sedans. The six-cylinder turbocharged petrol-drinking RS4 and the M3 are no joke, but they are saner than their brethren.

So let us...