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After reading the article in the name of P. Mancini on the history of the two-cylinder in Vroom in January 2019, I would have personal considerations to make and I do not all agree with what Mancini wrote.

I start by saying that when we talk about horses, one should think of the large four-legged mammal, which perhaps everyone knows. The CV symbol (translator’s note: CV = HP) has not been in force for over 40 years and is no longer even mentioned in the international system (SI). In this regard, just refer to the legal provisions of your country, contained in the Decree of the President of the Republic of 12 August 1982, n. 802, where the legal units to use are written, but the CVs are not there. Today everything is almost measurable.

There are few who can give a tangible meaning to what is mistakenly called CV, let alone then when we talk about kW. Without referring to documentation or tapping into information from the Internet, only a few people, when you talk about the power of engines, know exactly what a CV is.

As far as I know, according to my knowledge, it is true that Jan Thiel (and not Jah) worked in Aprilia and collaborated on the RSA 125 engine project, but the project leader of that engine was the engineer Luigi Dall’Igna.

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About Vroom International

In this issue: Fair for fun The 2019 edition of IKA-KART 2000 in Offenbach, the unmissable exhibition for kart enthusiasts, aimed above all at leisure karting more than racing X-RAY TM 125 KZ-R1 THE WAY WE WERE ROTATING DISC ENGINES INTERVIEW GIANCARLO TININi Focus G Line Accessories WATER TEST 7 PUMPS COMPARED I love kart GEORGE RUSSELL EMILIANO CYRUS LEGENDARY KART FAYE ‘LADYBUG’ PIERSON