Fastest speed you've gone on the motorway?

Faster than legal. That's all you need to know.

70mph Officer.

Around 100 miles per hour

85 mph (~137 kmh) on my 01 Taurus (IDK how much faster it can go before it starts falling apart)
and 90 mph (~145 kmh) on a 97 Aerostar. (That's the "max" speed on that van)

i got locked up in canada ..nissan 3 litre twin turbo ....afternoon in cell $350 fine ..im english ..they only spoke french ..quebec ...fined for speeding on german autobahn ...110 ..with trailer ...but over 160 mph on same road ..still got overtaken

204KMH in a rented Opel on the A-60 autobahn.

144mph in a 3.0 liter Ford Capri.
I think it was about that speed. Problem was, the speedo only went to 140, and it hit the needle past it.

UK - I'm not publishing that!

144 mph in a Ford Shelby Cobra.

100 mph.but it was not on a motorway it was a normal highway.

140 m.p.h. on a motorcycle.

85

90

80 mph in a camry lol

no

150kmph Subaru WRX 2004 HAHA

130 mph. (I have never owned a car that could exceed that by much.)

I got a ticket for 93mph, have gone faster though.

130 in my s10 350 swap

115mph on a Goldwing.

85

UK answer.
70MPH.

135 MPH, also in a Ford Shelby Cobra, right before it threw a rod and caught on fire. BTW, I wasn't driving.