The worst Tier 3 car in non tuned form would have to be the viper due to lack of handling, BUT, the Viper was never really designed from a handling point of view. They are sickenly fast in a straight line (v10 will do that) with great power to weight ratio. You can tune them to handle a LOT better but it includes changing the way the car sits into corners and it then no longer feels like a viper, more like a AMG 65.
I mean i have got my XC Ford to drift and its a tank (For the Non Australians its a 77 Ford Falcon designed on mustang body but heavier, but still has a stroked 351{now 383} clevo and tremec t5 tranny) so it doesnt quite feel like a big beast any more.
I guess what i am saying is that given the right adjustment you can get them all to do what you want but remember what you started with. A tuner will never be a muscle car and vice versa. (With the exception of movie F&F Tokyo Drift which made all Ford enthusiasts quiver with shock & horror)
BTW LTD you are right, the civic cruiser is so funny drifting, try it down the mountain, you will get a serious shock at just how well it does drift!
383 Clevo. Lazy HP with silly results!