The Riva 66' Ribelle is a 20.67-metre current Riva Sportfly model. Riva publishes a 5.29-metre beam, 1.80-metre draft and 3 guest cabins.
Official specifications list Twin MAN V12 1550 diesel engines. The highest published configuration reaches 37 knots, with cruising speed up to 33 knots. Fuel capacity is 3,800 litres and water capacity is 710 litres.