We tested the latest model in the Quicksilver range, the 805 Open, equipped with two different engines: a 225 hp V6 and a 300 hp V8. What are the performance variations between these two options? What's the best engine selection for this open hull?
One Open, two engines
Launched in 2023, the Quicksilver 805 open is a versatile family boat. Measuring 7.66 m, with a displacement of 1,684 kg, it is approved for 10 passengers.
We had the opportunity to test this American Open with two different engines. These tests took place in similar weather conditions, with a crew of 4 adults, and a full fuel tank in both cases. As the boats were new, our tests were carried out with clean hulls.
The V6 225, the recommended engine
Our first outing was with the 225-hp Mercury. This 3.4-liter V6 weighs 216 kg. We tested it while sailing between Hyères and Porquerolles, with a short chop and a wind of around fifteen knots.
In these conditions, the 805 Open was out of the water in 7 seconds. We reached a top speed of 34 knots, while our cruising speed was 22 knots at 4,000 rpm. At this speed, the 225 hp engine consumes 30 liters per hour, or 1.36 l/mile.
These performances are quite respectable, and will be sufficient for family use, which is the primary vocation of the Quicksilver 805 Open. If you happen to be sailing with more passengers, the lift-off time will be too long for towed sports such as skiing or wakeboarding, but sufficient for buoyancy.
The V8 300, maximum authorized power
We then tested the 805 Open with a Mercury block developing 300 hp. This 4.6-liter V8 weighs 272 kg. We tested it off Mandelieu la Napoule, with a fine sea and a ten-knot westerly wind.
From the outset, the Quicksilver has a sportier character with this large engine. Lift-off takes just 5 seconds, and we reached a top speed of 37 knots. Cruising at 4,000 rpm, we reached 21 knots, with an hourly consumption of 33 liters per hour, or 1.57 l/mile.
With an extra 75 hp, the Quicksilver 805 Open has a sportier character, and will be more efficient when carrying large numbers of passengers. Throttle-overs are much smoother, thanks in part to the smoothness of the V8.
The balance sheet
In terms of performance, the difference between the two engines is quite small. a 3-knot difference in top speed, with a 75-horsepower difference, isn't much. Fuel consumption is logically in the 225's favor, with savings of 3 to 4 liters per hour at cruising speed and nearly 15% per mile.
Noise levels are noticeably better for the V8, which has a more harmonious sound.
The difference in price between the two engines is around ?6,000. What's more, there's no French tax on the 225, unlike its 300-hp big brother, which is subject to the annual French tax. Add to this a slightly higher maintenance cost for the V8, and higher fuel consumption, and the extra cost of the 300 hp will be hard to justify.
In conclusion, unless you're sailing with a very large family, the 225 hp V6 proves to be an interesting compromise. Its respectable performance and budget benefits make it an excellent choice.
