88 MPH

Transcript:
[noticing what's happening]
Holy shit! Let's see if you bastards can do 90.
[he floors the DeLorean, accelerating to 88 mph and travels to November 5th, 1955, crashing first into a scarecrow and then into a barn, all the while screaming]

Transcript:
Marty McFly:
[Marty jumps down through the bushes as he watches the Libyans chase his past self around the parking lot. The DeLorean speeds up to 88 mph , then disappears in a flash of light which blinds the Libyans and sends them crashing into a photo stand]

Transcript:
Doc:
[into the walkie-talkie from inside the cab of the train]
Each detonation will be accompanied by a sudden burst of acceleration. Hopefully, we'll hit 88 mph , before the needle gets much past 2,000.
Marty McFly:
[into the walkie-talkie]

Scene Description:
a man looks out of a car window with the number 1 on it.

Transcript:
90. Go on, go on, go on! Wow. He's just pipped me!
Why has he not gone for the 100? Still good, though. Good effort. Not a clue how fast or anything. Do you know how I feel sorry for?
The Nomad. Havin...

Scene Description:
a digital speedometer shows the speed of 88 mph.