Yeah I agree. GC8V isn't 'jian'. The car may be the same as
Bunta's but for some reason it doesn't drive the same way. If 2
players challenge and 1 is a GC8V (assuming both fully tuned), the
GC8V will lead the way initially. But for Bunta challenge, using a
GC8V, it's not possible to always take the lead initially
especially at higher stars, even against Bunta's AE86. If the GC8V
that the player can use drives like Bunta's GC8V in Bunta Challenge
at the higher levels, then yes I'll say it's a 'jian' car.
The only situation where Bunta's GC8V is the same as the player's
GC8V in terms of speed and power (at player's fully tuned) is in
Akina story mode at 7 stars. He'll drive right beside you,
advantage is only +/-0.5m. Whoever is on the left will win since
the first turn goes left.