Re: marine Alfa engines

[Gene Brown <alfagene@xxxxxxxxxxxx>]

The Montreal Home Page http://www.alfamontreal.info/ has a section 
devoted to marine uses of the Montreal and Tipo 33 engines. To quote 
from the web site:

> Marine adaptations 
> <http://www.alfamontreal.info/Montreal/MarineV8.jpg> of the Montreal 
> and 33/3 engines by Autodelta achieved several powerboat competition 
> victories in the early 1970s. To comply with the Racers 2500 category, 
> the displacement of the 2593 cc Montreal engine was diminished to 2466 
> cc by reducing the bore from 80 mm to 78 mm. Apart from the new 
> Autodelta pistons and liners (AD.105.55.02.031.026), the principal 
> modifications concerned the engine supports, the exhaust manifolds 
> (AD.105.55.01.072.008) and output couplers and the oil/coolant heat 
> exchanger (AD.105.55.31.045.019). Autodelta produced a descriptive 
> brochure <http://www.alfamontreal.info/Montreal/Marino1.jpg> for the 
> "Motore Marino Alfa Romeo Montreal".
>
> This engine <http://www.alfamontreal.info/Montreal/ADmarine.jpg>, 
> which weighed 190 kg, developed 190 bhp in standard form 
> <http://www.alfamontreal.info/Montreal/Marino2.jpg> and 260 bhp in a 
> tuned version. In October 1971, Franco Gilberti's Montreal-powered 
> speedboat <http://www.alfamontreal.info/Montreal/Gilberti.jpg> carried 
> off 3 world records in this class at Sarino. In 1973 other 
> Montreal-powered racers such as Celli and Popoli were victorious at 
> Lignano Sabbiadoro and Cremona, while the Montreal-powered speedboat 
> Frigerio-Lucini won the R4 2500 class world championship at Sabaudia.
>
> Popoli is exhibited outside the basement floor of the Alfa Romeo 
> Museum <http://www.alfaromeo.com/eng/museo/default.htm>, Arese, Italy. 
> With a 2465 cc 78 x 64.4 mm Montreal engine tuned to 315 bhp at 8800 
> rpm, Leopoldo Casanova achieved a world record speed of 225 km/h with 
> this speedboat on the Lake of Sabaudia.
>
> Offshore boats equipped with twin Montreal engines competed 
> successfully in the OP2 class (limit 8200 cc) and in September 1973 
> Caprara and Scalabrin's speedboat UFO 66 
> <http://www.alfamontreal.info/Montreal/UFO66.jpg> established a new 
> European record in this category at Alassio.
>
> The marine version of the 3-litre Montreal engine developed 340 bhp 
> but an Autodelta adaptation of a 4-litre version of the 33/3 engine 
> raised the power to 500 bhp for a weight of 180 kg. The all-Italian 
> offshore powerboat Dart, which was equipped with two such engines 
> <http://www.alfamontreal.info/Montreal/DualMarine.jpg>, was capable of 
> speeds of about 150 km/h.
>
The web site also has lonks to several pictures of the engines and the 
boats. Go to the Marine Montreal section.
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