The Viper 640 represents a pivotal moment in the evolution of the modern sportboat, effectively bridging the gap between the visceral speed of a high-performance dinghy and the stability of a fixed-keel boat. Designed by Brian Bennett in 1996 and later revitalized through a partnership with Rondar Raceboats in 2005, the 21-foot vessel was conceived to provide a high-performance racing experience that is both physically demanding and technically rewarding. Built using advanced composite construction, including a foam-cored GRP hull and a carbon fiber mast, the Viper 640 is light enough to plane in moderate breezes yet remains manageable for a crew of three or four. Its design philosophy centers on simplicity, eliminating complex systems like backstays and runners in favor of a powerful, modern rig and a deep, lifting bulb keel. According to Sail Magazine, the boat’s resurgence under Rondar’s stewardship turned it into one of the most successful one-design classes in North America and Europe, appealing to sailors who prioritize speed-to-cost ratios.
Viper 640 Sailboats for Sale & Market Overview

- Make
- Viper
- Model
- 640
- Builder
- Viper Boats /Rondar
- Designer
- Brian Bennett
- Number Built
- 400
- Production Year(s)
- 1996 - ??
Below are the most recent Viper 640 sailboat listings (up to 10).
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| Source | Year | Make | Model | Price | Cabins | Heads | City | Country | Listing Date | |
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DISCLAIMER: We are not affiliated with any external listing websites in any way. We simply aggregate publicly available listings to make it easier for buyers to find sailboats for sale. We cannot guarantee the accuracy of the listings, so please verify all information with the seller before making any decisions.