Ive had both 350z gt and now Z4. TBH both are 2 seaters and both can be had in coupe and roadster. The 350z defo is alot more spacious and comfortable compared to the z4. I would probably say the 350z is the better alround car and better as an everyday drive.
But as i had bought a brand new 320i sport plus which cost the earth, i would have lost a fortune trading it in so new for a 350Z. But i got a great trade in against the Z4 from bmw. So i'll probably drive the Z4 for a year or so then sell it private and buy another 350Z.
BMW ended up giving me £3700 more trade in than anywhere else offered me, so i can take a lose on the Z4 when the time comes to sell it.
Also the Z4 has always been on my list anyway.
The only negative about the 350Z is the rad tax and fuel consumption which i have halved with the Z4 but as someone will point out im sure, ive lost a fair wake of performance. But i dont care because im as happy as a pig in @*!# just now!
Don't blame you then if you got a good trade in. Few things are more painful than losing a shedload more than you imagined when selling a car (I should know).
Half the running costs?! Starting to wish I'd got one instead, might not have had to sell it. OK, maybe not as quick in a straight line, but round the corners, nowt in it I'd wager, and I doubt it has half the performance either, it'll probably only be a tad slower particularly to 60.
TBH, there's not much in it 0-60 etc but the 350z felt more powerful. The Z4 feels more grounded, maybe because its a smaller car. Also there's not much in the dealers servicing costs etc. suppose its just down to what you want.
The new Z4 now comes in a 20i, dont think its slow, because its a twin scrol turbo. This boosts performance but also returns 38 mpg and road tax is £100ish per year. Also its a hard top convertible. Its also available as a 28i with same 2.0l engine but tunned better and there's the 35i and 35is which are animals.