Они даже не V6 сравнивали, а Iron Duke 4х цилиндровый 88 сильный рядник

а по поводу V8 , то напрмер в International Race Of Champions (Отсюда название некоторых камаро IROC-Z) отдали предпочтение платформе Pontiac\Chevrolet, вот список победителей:
Season Year Champion Car
I 1974 United States Mark Donohue Porsche Carrera RSR
II 1975 United States Bobby Unser Chevrolet Camaro
III 1976 United States A. J. Foyt Chevrolet Camaro
IV 1977 United States A. J. Foyt (2) Chevrolet Camaro
V 1978 United States Al Unser Chevrolet Camaro
VI 1979 United States Mario Andretti Chevrolet Camaro
VII 1980 United States Bobby Allison Chevrolet Camaro
VIII 1984 United States Cale Yarborough Chevrolet Camaro
IX[3] 1985 United States Harry Gant Chevrolet Camaro
X 1986 United States Al Unser, Jr. Chevrolet Camaro
XI 1987 United States Geoffrey Bodine Chevrolet Camaro
XII 1988 United States Al Unser, Jr. (2) Chevrolet Camaro
XIII 1989 United States Terry Labonte Chevrolet Camaro
XIV[4] 1990 United States Dale Earnhardt Dodge Daytona
XV 1991 United States Rusty Wallace Dodge Daytona
XVI 1992 United States Ricky Rudd Dodge Daytona
XVII[5] 1993 United States Davey Allison & United States Terry Labonte(2) Dodge Daytona
XVIII 1994 United States Mark Martin Dodge Avenger
XIX 1995 United States Dale Earnhardt (2) Dodge Avenger
XX 1996 United States Mark Martin (2) Pontiac Trans Am
XXI 1997 United States Mark Martin(3) Pontiac Trans Am
XXII 1998 United States Mark Martin(4) Pontiac Trans Am
XXIII 1999 United States Dale Earnhardt (3) Pontiac Trans Am
XXIV 2000 United States Dale Earnhardt (4) Pontiac Trans Am
XXV[6] 2001 United States Bobby Labonte Pontiac Trans Am
XXVI 2002 United States Kevin Harvick Pontiac Trans Am
XXVII 2003 United States Kurt Busch Pontiac Trans Am
XXVIII 2004 United States Matt Kenseth Pontiac Trans Am
XXIX 2005 United States Mark Martin[7] (5) Pontiac Trans Am
XXX 2006 United States Tony Stewart Pontiac Trans Am
http://en.wikipedia.org/wiki/IROC
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Chevrolet Camaro 1988 5.1L V8 carb, T-5 ручка