For instance, a sunroof, rails, and motor add weight. On average, a car equipped with a power retractable roof panel weighs about 30 to 40 lbs more than a comparable model with a solid roof.

Simply put, a lot of the C70's value lies in its excellent retractable hardtop roof which allows quiet highway cruising for long-distance trips as well as tight, 4-season insulation. The C70 has just ...