I blame the fact this movie isn't out on DVD yet for its not already being in this database here.

http://img.photobucket.com/albums/v609/Kooshmeister/iflooks_lotus.jpg
A red Lotus of some sort, presented to the hero.

http://img.photobucket.com/albums/v609/Kooshmeister/iflooks_nissan.jpg
A white Nissan 300ZX (on the left) driven by the hero's love interest. Best shot I could get of it under the circumstances.

http://img.photobucket.com/albums/v609/Kooshmeister/iflooks_saab.jpg
A black Saab 900 Turbo driven by the villain's main henchman.

http://img.photobucket.com/albums/v609/Kooshmeister/iflooks_bus.jpg
A tour bus that carries the hero's classmates; I don't know the make or model.

http://img.photobucket.com/albums/v609/Kooshmeister/iflooks_rollsroyce.jpg
A Rolls-Royce that the British agents use to evac the hero from the airport; unsure of the model.

http://www.imcdb.org/movie_102095-If-Looks-Could-Kill.html

Kooshmeister, if you could provide ratings of vehicles's roles, that information could be added. Thanks

Okay, hmm, I'm a little unfamiliar with how the ratings work, but let's see here....

The Lotus - 4 stars
The Nissan - 3 stars
The Saab - 3 stars also
The Rolls-Royce - 2 stars
The bus - 4 stars, surprisingly

Admittedly I only submitted the principle cars. Here's the rest of the cars that appear in the film. And from now on I think I'm going to use Imageshack rather than Photobucket.

ATV ridden by a minor henchman (there are two). 2 stars.

A different ATV ridden by the main henchman. It appears to have six wheels (either that or it's a mini-halftrack), as can be seen in the second pic there. 3 stars.

Family wood panel station wagon. 2 stars.

What appears to be a Citroen DS 21. 1 star.

Citroen 2CV on a jack. 2 stars.

A police car. 2 stars.

The villain's stretch limo which shows up in two scenes. 2 stars.

Unknown car that passes the main henchman hitching. This is honestly the best shot I could get; milliseconds after this frame it cuts to a close shot of the henchman watching the blurry top part of the car go by in the foreground (see second pic). Whoever can identify this car will be my personal hero. 1 star.

A Mercedes-Benz. 1 star.