The new issue of Grassroots Motorsports magazine hit my mailbox today, and it includes a track session comparing comparably equipped, same wheels, same tires, same brakes, etc, and upgraded new Miata vs. a 124 Spider on track. Both cars were prepped by the Good Win Racing guys, and bottom line....The FIAT was lapping about a second a lap faster! They plan to do another comparison on an autocross track in the future too.