I've been playing IV and the DLCs for the past two weeks, after completely finishing V, and it's absolutely heavenly, delightful, exhiliarating and joyfully orgasmic to once again experience the driving in them. The momentum, the inertia, the weight shifting, the steering, the suspension, the drifting, the power sliding, the collision damage, the non-exaggerated acceleration, braking and speed, makes me realise that I will never go back to playing V ever again. Despite the gorgeous and detailed, yet ultimately empty, world and improved gunplay, the driving physics is a game-breaker when it comes to any replay value for me.
I have spent hours on end, over the past fortnight, merely racing and cruising Liberty City in every vehicle I can get hold of, and there are some which I'd never driven before. Each one is unique, with its own physics and performance. The wild ride of the Banshee and Coquette, the high performance of the smooth handling Turismo and Infernus made me have a sex wee. The SUVs handle the way they should and the saloons are a joy to ride.
As for the motorcycles...what in the name of the Dark One Below was the unholy sh!t that was aborted to be presented as motorbike physics in V? The motorcycle physics and handling are as close to perfect as they can get in IV. Each bike is so unique, you cannot ride different bikes (or cars) exactly the same way, you need to adapt your driving style to the vehicle you're in. In V, it's all the same...hold down the accelerator, twitch the left stick, and you don't need to bother with the brakes or e-brake - you don't need to adapt to the vehicle, and this is why the driving in V is boring, monotonous and the vampires have sucked every last drop of fun and enjoyment out of it to leave a dessicated husk of its former glory.
Sod this for a game of soldiers, I'm going back to the GTA IV board.