<incorrect answer>the Volkswagen w12. its a concept car but that's all there is that starts with W</incorrect answer>
Makes that start with "W"
Willey - Made the famous WWII Jeep
Weineck - A German car company
Wolsley - British police cars of the 40s and 50s
Wartburg - Made in East Germany in the 60s
Models that start with "W"
Jeep Wrangler and Wagoner
I'm sure there are more models that start with "W"