There’s always been a huge chasm, in India, between the mid-size luxury sedans – the 5-series, E-class, A6 and XF, and their larger, limousine siblings – the 7-series, S-class, A8, and XJ. This is partially because those larger cars get larger engines, but more so because they’re only sold in India in their stretched, long-wheelbase guises. The result is, if …