Is this 'serious' or just one of those motors things I haven't been around long enough to understand?
Anyway, I wonder if the people who wet themselves over twincharging realize that it was implemented in a Nissan Micra a whole 20 years ago?
I don't think the TSi engine is anything special whatsoever. They've just used a small engine to get better fuel economy? IMO what is FAR more impressive is taking a larger engined car and MAKING it economical.
For example, the 135i has 306bhp, from a 3 litre twin turbo petrol engine - it achieves 34mpg.
The VW TSi engine has a 160bhp 1.4 super/turbocharged engine and achieves 44mpg.
Which is the bigger technological achievement?