300ZX
The slowest accelerating car of the 'Big Four' from Japan.

The Mitsubishi 3000GT VR-4, Toyota Supra Twin Turbo and Mazda RX-7 Twin Turbo all ran faster times through the quarter mile and from 0 to top speed.
Oh the 300ZX Twin Turbo? Z32 TT? Yeah it does 60mph in 5.5 to 6.0 and the quarter mile in 13.7-14.4@99-103. The VR4 did 60mph in 4.7-5.0 and the quarter mile in 13.2-13.5@101-105mph