It just sounds right and threw up a few relevant web hits.

chunky lines with a flatter front end than...

Hope it helps

I recently bought a new car, and my husband and teenage children were really outdone b/c I bought the car with the rounder edges instead of the one with the sporty BMW-like design with the squared-off edges.
I might use something along the lines of "sculpted" for kantig.
See the web sites below:
(1) Galant lines are sleek yet there are sculptured lines that are not present on some more egg-like shapes. The corporate nostrils are less evident, and the rear lights have lost the Klingon battle cruiser shape now that Taurus adopted similar layouts. If anything, there is a hint of the BMW look in the front, a not inappropriate comparison when the handling and spirited driving is considered.

http://www.womanmotorist.com/review/mitsubishi/bs-mitsubishi...

(2) Driving Innovation - A Preview of Things to Come
... any way automotive designers want for front ends that are lower and flatter. Integrated
front end - entire front end modules that incorporate safety and energy ...
www.plastics-car.com/innovators/preview.html - 7k - Cached - Similar pages
HTH, Beth.

The leading exponents of the new, more angular trend in design are Ford, whose Focus features what they call "leading edge" design. You could try looking at stuff on the Focus to get the new buzz words.