Dewar Trophy

Some of the trophy winners include:[2]

• 1906 - Stanley Motor Carriage Company "Rocket Racer" driven by Fred Marriott. Broke the land-speed record at 127.66 miles-per-hour.[3]
• 1907 - Rolls-Royce Limited, for 40.50 hp model covering 15,000 Miles
• 1908 - Cadillac, for parts interchangeability. The award was actually presented in 1909.[1]
• 1909 - Daimler, for their Knight sleeve-valve engine.[4]
• 1912 - Cadillac for the electric starter and electric lights.[1][5]
• 1922 - Armstrong-Siddeley Motors Limited, for 10,000 Miles trial
• 1925 - Rover Company Limited, for 13,96 hp car, Fifty ascents and descents of Bwlch-y-Groes
• 1929 - Violette Cordery, sister-in-law of Noel Macklin, for driving an Invicta for 30,000 Miles at Brooklands
• 1950 - Rover Company Limited, for the Rover JET1 gas turbine powered car.
• 1951 - Jaguar Cars Limited,[6] for performance in four major international events
• 1959 - BMC and Alec Issigonis, for design and production of Mini
• 1963 - Coventry Climax Engines Ltd,[7] for Grand Prix racing engines. Presented in 1964.
• 1969 - Cosworth for DFV Formula One engine
• 2009 - Mercedes-Benz High Performance Engines – Formula One Kinetic Energy Recovery Systems (KERS)
• 2013 - McLaren Automotive for development and launch of its advanced sell-out McLaren P1 supercar
• 2014 - Mercedes-AMG High Performance Powertrains, awarded for the PU106A Hybrid Formula One power unit.[8]
• 2016 - Gordon Murray and Gordon Murray Design, for the iStream chassis design and the Ox, a flat pack vehicle designed for the Global Vehicle Trust.[9]
• 2017 - Jaguar Cars for the I-Pace Concept battery-electric crossover SUV
• 2018 - Integral Powertrain for their electric motors used by the Volkswagen I.D. R prototype fully electric vehicle
• 2019 - JCB (company) for the 19C-1E electric mini excavator – the construction industry’s first fully electric mini excavator. [10]

On Saturday, 29 February 1908, three Model Ks from the 1907 Cadillac production were released from the stock of the Anglo-American Motor-car Company, the UK agent for Cadillac automobiles,[11] at the Heddon Street showroom in London (these were engines Nos. 23391, 24111 and 24118). The three cars, all registered in London under the numbers A2EO, A3EO and A4EO, were driven 25 miles to the Brooklands race track at Weybridge. There, the cars completed ten laps of the track, or approximately 30 miles,[11] before being locked away until Monday, 2 March 1908,[12] when they were released and disassembled completely,[11] using only wrenches, screwdrivers, hammers, and pliers.[13] Each car was reduced to a pile of 721 component parts, which were then scrambled into one heap by the RAC.[13] Eighty-nine parts[13] requiring extreme accuracy were withdrawn from the heap, locked away at the Brooklands club house and replaced with new parts from Anglo-American's showroom stock. The parts were then sorted into three piles, each with all the parts needed to assemble a car.[13] A mechanic - Mr. E. O. Young - reassembled the cars with the help of his assistant - Mr. M. M. Gardner. Sometimes they had to work ankle-deep in water, using only wrenches and screwdrivers. The third car was re-assembled by Thursday morning, 12 March.[14] With the painted parts on the original cars not being identical in color or style, the reassembled cars were mismatched in appearance, gaining the nickname "harlequin cars".[14] By 2 p.m. on Friday 13 March the three cars had completed the mandatory 500-mile run with singular regularity.[14] Only one point was lost owing to a broken cotter pin in the ignition lever (promptly replaced from stock). During the event, it was reported that one of the sheds where the parts were stored became partly flooded during a heavy storm and some parts became rusted. Only oily rags could be used to remove all traces of the immersion. On completion of the test, one of the cars was locked away until the start of the 2000-miles reliability trials in June 1908.[14][15] It came out the winner of the R.A.C. Trophy for its class.[15] Parts interchangeability had been publicly demonstrated and field tested.

Source[16]

Immediately following the introduction of the sleeve-valve principle into the Daimler engine, the Daimler Company in 1909 asked the Royal Automobile Club to frame conditions of a test that should be of unprecedented severity and would demonstrate in the most public manner possible that the new Daimler engine was in every way reliable.

The two engines selected for this test were a 38 and a 22-h.p., having a bore and stroke, respectively, of 124 by 130 mm. and 96 by 130 mm. They were bolted down to the test bench close together in one of the large engine testing shops at the Daimler Works. The section of the shop in which they were placed was railed off and under the sole charge and observation of the R.A.C. officials from the start of the test to the finish. The observers kept watch day and night just as on board a ship, and periodically tested the revolution counters and spring balances to ensure that the engines were always running under full load. Every possible precaution was taken to keep constant and close observation upon the test, and there were never less than two observers on duty.

Both engines were started up at 6 a.m. on Monday, March 22, 1909, and each completed the 132 hours' bench test on the following Saturday evening. To appreciate more clearly the severity of the test, if the larger engine had been driving a car during the whole time, with the standard Daimler gear ratios, a distance of no less than 8,252 miles (13280 km) would have been covered, at a mean speed of 43.45 m.p.h. (69.92 km/h) while the smaller engine would have covered, similarly, a distance of 8,830 miles (14210 km) at 48.4 m.p.h. (77.9 km/h). The disparity in speed and distance between these results is, of course, attributable to the higher rate of revolutions of the smaller engine.

• List of motor vehicle awards
• Invicta - Double Dewar Trophy winner: 1926, 1929.
• Fred Marriott – driver of the Stanley Rocket, the car that has held the Land Speed Record for a steam-powered vehicle from 1906 to 2009.[17]
• Ricardo plc - Double Dewar Trophy winner: 2002, 2005.

• Goodman, Bryan (2004), American Cars in Prewar England: A Pictorial Survey, Jefferson, NC US: McFarland, p. 33, ISBN 0-7864-1540-1, LCCN 2003019129
• Holland, J. P. (5 March 1908a). "Motors and Motoring: The Cadillac Trial". The Manchester Courier (16014). p. 2. Retrieved 26 March 2015 – via British Newspaper Archive.
• Holland, J. P. (13 March 1908b). "Argument for Cheaper Cars". The Manchester Courier Weekly Supplement. LXXXIV (16021). p. 7. Retrieved 21 October 2014 – via British Newspaper Archive.
• Holland, J. P. (19 March 1908c). "Motors and Motoring: The Cadillac Trial". The Manchester Courier (16026). p. 11. Retrieved 26 March 2015 – via British Newspaper Archive.
• Holland, J. P. (11 November 1908d). "Motors at Olympia". The Manchester Courier Weekly Supplement (16229). p. 9. Retrieved 26 March 2015 – via British Newspaper Archive.
• Jones, Mike (February 2002), "History of the Cadillac Motor Car", modifiedcadillac.org, archived from the original on 17 December 2013, retrieved 21 October 2014
• Rubenstein, James M. (2001). "7 From a Class-based market...". Making and Selling Cars: Innovation and Change in the U.S. Automotive Industry. Baltimore, MD US: The Johns hopkins University Press. ISBN 0801867142. LCCN 00012496. Retrieved 26 March 2015.
• "The Dewar Trophy". Royal Automobile Club. Past winners. Archived from the original on 28 October 2013.