Gifts for the wife

Three guys are bragging about what they bought their wives:

The first says:
I bought her something which goes from 0 to 100 in 6 seconds"
The other two guys don't know what he's talking about so he reveals,
"I bought her a nice Porsche"

The second guy says:
"I bought something which goes from 0 to 100 in 4 seconds."
"That HAS to be a Ferrari - right?"
"Yeah that's right!  I bought my wife a nice red Ferrari"

The third one says:
"I bought my wife something which goes from 0 to 200 in just 2 seconds."
"THAT CAN'T BE - The Ferrari is the fastest car in the world?!"
"Well - it's not a car, but ........."