Gazwould
MB Enthusiast
This has everything to do with marketing and little to do with reality - they will always quote the absolute max they have achieved on one particular car because they want to attract you to them and away from their competitors. Whether it is repeatable over all similar engined cars is another matter. Whether it creates a car that is over-stressed or has a poor power delivery is not relevant either when it comes to the 'marketing message'.
There are some that do the opposite and quote minimum gains .

