I wanted to make a car pretending that there was a radial mounted in the back. I would suggest locking the rear diff and the power delivery is crazy. Speeds over 400kmph (250 mph) will result in the tyres exploding.
Radial engine sounds were very difficult to get right, I'm not super happy with how it worked out so I may do an update in the future.
Please note that the YouTube video uses an older version and the sounds have been changed a little (hopefully better)