There is an interesting analysis on Chinacarforums: China-produced Western cars tend to come out bigger than their Western siblings. Especially at the higher end. A made-in-China Cadillac STS is 124mm longer than the U.S. sister model. The wheelbase grew by 100mm. A Chinese Audi A6 L has gained 97 mm in length over the Made-in-Ingolstadt relative. A BMW 5-series, made at the Chinese joint venture with Brilliance, has gained a whopping 140 mm in length and wheelbase over the Bavarian model.