Choices after an m3

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So the m3 has gone and I need a tourer.

I have about £6k to inject and speaking to many dealers a new 335d x drive m sport with good spec ( pan roof, pro Nav, m sport plus) is coming up at £400 month.

Thoughts are I need adaptive drive on 335d but whilst this improves things I have heard the rwd f31 are better handling. So am considering a 335i or 330d and dare I say it an s4 avant.

On paper the 335d looks amazing and not far off the pace of my old e90 m3 which quite frankly is bonkers! However I want an engaging drive and whilst diesels are good I prefer petrol cars.

Thoughts please?

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Tramlining really?

Is it as bad as the e46 was on 19's?

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New car has to achieve 33mpg combined

Which is either a 335i and s4 2012 or newer,

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Not trying to achieve those mpg really just need to provide it to work because they have a minimum mpg for fuel cards. It's never tracked it just needs to be the claimed combined mpg figure.

My m3 averaged 22.8mpg over the 10k miles I put on her which i thought was pretty good. This is very near the claimed figure so I assume a petrol car would be better than a diesel mainly because my 12 mile commute each day wouldn't give a diesel enough time to get anywhere near its claimed unless I babied it all the way.