Since owning my 150 cdti, (only 2weeks) I have realised it is quite a nippy car and can keep up with quite a few thing on the motor way and on short blasts.
Mine is standard and running very healthily.

But I am not too sure what its quite capable of, so I am curious who had what and how you “had it off” in you car??? Now I know we are not all boy racers and I am not talking about reckless stupid driving, I just mean those occasions when you put your foot down and pull away surprising the other driver, weather it be at a traffic lights duel carriage way or on the motor way.
But if you post then please say if your car is standard or list your mods….

Mine was a on a motor way, was about 40mph behind a slow lorry with a mondeo st cdti up my rear. As soon as the truck pulled over I was in 4th, I pulled over in to the slow lane and booted it! The st couldn’t get past me he was stuck just behind me on me rear quarter, eventually he realised he was beat and we both slowed and he pulled in behind and flashed, later on I pulled in to a petrol station and we both had a good chat about diesel power, and he was surprised as to how quick my sri 150 was…… cool iam happy with the new motor