I did some googling for you and what I found was that the largest trunks (boot to us) in sports cars are:
Mazda MX5 Miata
BMW Z3 and Z4
Honda S2000
Porsche Boxsters have the most carrying capacity of all sports cars with their front and rear boots.
All these cars will carry a large set of golf clubs, Bag and buggy.
The Porsche Boxter can carry all that and a weeks worth of luggage.
Hope that helps
