A normally aspirated Subaru Legacy (regular unleaded) wagon tows a
Cobra with ASW-24 just fine. My wife was driving that and I was
driving a Toyota Tundra with V6 (not V8) engine, pulling ASH-26E,
behind her. It was all I could do to keep up during accelleration :-)
I think the Lagacy is a '02 or '03 - belongs to a friend but is almost
identical to one we own (without hitch - that's why we have the
truck).

-Tom