The car weighed 480kg and did 0 to 100 km in 5 secs.
The complete car weighs 455 kg without fuel and driver.
The cars are 5640 mm long, and weigh 5,05 tons when empty.
The cars weigh just over 300 pounds, including the driver.
The car weighed in light, so a couple of quarters were duct-taped on.
"But each car weighs 40 tons and he could not bring the train to a stop in time."
Twenty years ago, a typical American car weighed close to 4,000 pounds, with virtually no plastic.
A typical car weighs 3,200 pounds, the institute points out.
The E420 also feels more massive, even though both cars weigh about the same.
The car weighs 300 pounds less than the standard M3 due to various weight savings.