1949 Vincent H.R.D. Comet Back to contest Vote Description 1949 Vincent H.R.D. Comet Sometimes called a "Half a Vincent," the Comet was a single-cylinder alternative to the Vincent big twins. It still offered a strong 28 bhp and 90 mph top speed. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Δ Share OK More