A car will have less and less „wheel“ ps than „brake“ ps, because each component between the engine and the asphalt adds an additional layer of air resistance. For this reason, verified dyno races offer a much more practical evaluation of a car`s performance than a manufacturer`s specifications. Two cars with the same braking power may have different power values, as the transmission, control, axles and wheels affect the figure. A gentleman`s agreement, defined at the beginning of the 20th century as „an agreement between gentlemen who looks at price control,“ has been described by one source as the most lax form of a „pool.“  Such agreements have been declared in all industrial sectors and are numerous in the steel and steel industry.  Gentlemen`s agreements were a widespread discriminatory tactic, which would have been more common than restrictive alliances to preserve the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements made it extremely difficult to prove or follow them, and they were long after the U.S. Supreme Court decisions in Shelley/. Kraemer and Barrows v. Jackson.  A source indicates that the gentlemen`s agreements are „probably still in place“ but that their use has declined sharply.  Most car enthusiasts know the situation on the horizon, but according to CarThrottle, the Toyota Century V12 was also stifled, albeit easily, by the „agreement“ and actually made more than 300 hp instead of the alleged 276. On the west coast, an intense anti-Japanese atmosphere developed.
U.S. President Theodore Roosevelt did not want to anger Japan by passing laws banning Japanese immigration to the United States, as had happened with Chinese immigration. Instead, there was an informal „gentlemen`s agreement“ (1907-1908) between the United States and Japan, in which Japan ensured that there was little or no movement in the United States. The agreements were concluded by U.S. Secretary of State Elihu Root and Japanese Secretary of State Tadasu Hayashi. The agreement banned the emigration of Japanese workers to the United States and repealed the order of segregation of the San Francisco School Board in California, which had humiliated and angered the Japanese. The agreement did not apply to the territory of Hawaii, which was then treated as separate and separate from the United States. The agreements remained in effect until 1924, when Congress banned all immigration from Japan.  Similar anti-Japanese sentiments in Canada led simultaneously to Hayashi Lemieux`s agreement, also known as the Gentlemen`s Agreement of 1908, with substantially similar clauses and effects.  Dissent intensified when foreign manufacturers built stronger cars and limited the Japanese auto market abroad until the decisive (and surprisingly last) year of 2004. In July 2004, former JAMA President Itaru Koeda went to the press to tell them the truth – JAMA had not found a link between speed and road mortality. Koeda called for the end of the gentleman`s agreement.
Since 1989, Japanese automakers have all approved – at least on paper – a kind of gentlemen`s agreement that limited their advertised horses to 276 on domestically manufactured vehicles.