| Description | Date | Identifier | |
| Comparison of climbing capabilities for 40/50 HP and 20 HP models. | 16th Apr 1923 | Box 113 \ 2 scan0039 | |
| Calculation of climbing capabilities for the 40/50 HP and 20 HP models. | 16th Apr 1923 | Box 113 \ 2 scan0040 | |
| Page of calculations for power delivery, tractive resistance, and hill climbing for 40/50 HP and 20 HP models. | 2nd Jul 1923 | Box 113 \ 2 scan0041 | |
| Telegram received by telephone from Royce regarding a meeting in Chichester to test cars. | 2nd Jul 1923 | Box 113 \ 2 scan0042 | |
| Telegram received by telephone regarding a request for a 40/50hp car for photography and testing. | 2nd Jul 1923 | Box 113 \ 2 scan0043 | |
| Outlining the procedure for a comparative cooling test between the 40/50 HP and 20 HP car models. | 8th Aug 1923 | Box 113 \ 2 scan0044 | |
| Instructions for modifications to the 40/50 and 20 HP radiator and water tank systems. | 28th Aug 1923 | Box 113 \ 2 scan0045 | |
| Acceleration and pulling-up distance for a 6.EX type car. | 28th Aug 1923 | Box 113 \ 2 scan0046 | |
| Acceleration and braking test results for the 6-EX car model. | 29th Aug 1923 | Box 113 \ 2 scan0047 | |
| Performance test results for Goshawk 11 on Pistern Hill with wet roads. | 1st Nov 1923 | Box 113 \ 2 scan0048 | |
| Internal memorandum regarding the attachment of document Oy7-E-11623. | 19th Nov 1923 | Box 113 \ 2 scan0049 | |
| Copy of a letter from a traffic consultant requesting car acceleration data for a study on street intersection capacity. | 6th Nov 1923 | Box 113 \ 2 scan0050 | |
| Testing Hispano brakes on a car rolling backwards down a gradient. | 30th Jan 1924 | Box 113 \ 2 scan0051 | |
| Comparing the performance of RR and Hispano cars. | 2nd Feb 1924 | Box 113 \ 2 scan0052 | |
| The hill climbing performance of a 40/50 HP Landaulette in North Devon, with a comparison to a Hispano Suiza. | 1st Feb 1924 | Box 113 \ 2 scan0053 | |
| Braking tests conducted in North Devon on Porlock and Countisbury hills. | 12th Jul 1923 | Box 113 \ 2 scan0054 | |
| Comparison of chassis specifications and hill climbing performance between a 40/50 HP model and a Hispano Suiza in North Devon. | 12th Jul 1923 | Box 113 \ 2 scan0055 | |
| Comparison of E.A.C. High Speed Servo and Hispano braking systems during tests in North Devon. | 1st Apr 1924 | Box 113 \ 2 scan0056 | |
| Development and use of a 'home-made' recording accelerometer to measure car performance. | 1st Apr 1924 | Box 113 \ 2 scan0057 | |
| Proposed modifications to the Goshawk engine for increased efficiency and power. | 27th Jun 1924 | Box 113 \ 2 scan0058 | |
| 20 HP exhaust tests, comparing horsepower results between a standard and modified system. | 20th Mar 1924 | Box 113 \ 2 scan0059 | |
| Horsepower data for a 20 HP engine with standard and experimental exhaust systems. | 20th Mar 1924 | Box 113 \ 2 scan0060 | |
| Road test results comparing 'A' Standard and 'B' 40/50 Type systems during high-speed and hill climb tests. | 8th Sep 1924 | Box 113 \ 2 scan0061 | |
| Alleviating boiling issues on the 40/50 HP model. | 8th Sep 1924 | Box 113 \ 2 scan0062 | |
| Alleviating boiling troubles by hill climbing on indirect gears. | 18th Sep 1924 | Box 113 \ 2 scan0063 | |
| Engine cooling performance during hill climbs in different gears. | 18th Sep 1924 | Box 113 \ 2 scan0064 | |
| Vehicle performance concerning gearing, engine speed, and radiator cooling. | 18th Sep 1924 | Box 113 \ 2 scan0065 | |
| Series of graphs from radiator tests on Cat and Fiddle Hill, showing how overheating is reduced by climbing on indirect gears. | 16th Sep 1924 | Box 113 \ 2 scan0066 | |
| Exceptional qualities of a specific car chassis and a request to retain it for testing and demonstration. | 18th Sep 1924 | Box 113 \ 2 scan0067 | |
| Acceleration figures for the 40/50 HP Open Touring Car with both 2-wheel and 4-wheel brakes. | 17th Mar 1925 | Box 113 \ 2 scan0068 | |
| The reliability of acceleration and four-wheel brake tests published in 'The Motor' magazine. | 19th Mar 1925 | Box 113 \ 2 scan0069 | |
| Calculation of acceleration and braking curves for a 40/50 car with four-wheel brakes. | 19th Mar 1925 | Box 113 \ 2 scan0070 | |
| The variables affecting braking performance and the reluctance to provide definitive braking figures. | 19th Mar 1925 | Box 113 \ 2 scan0071 | |
| Continued analysis of vehicle braking performance curves and a critique of other published test data. | 24th Mar 1925 | Box 113 \ 2 scan0072 | |
| Figures for four-wheel brakes. | 24th Mar 1925 | Box 113 \ 2 scan0073 | |
| Braking performance data table for a four-wheel brake system on an open touring car. | 24th Mar 1925 | Box 113 \ 2 scan0074 | |
| Criticising press reports on acceleration and braking performance from motoring journals. | 24th Mar 1925 | Box 113 \ 2 scan0075 | |
| The inaccuracy of road tests from motoring papers ('The Motor' and 'The Autocar') due to speedometer errors. | 21th Mar 1925 | Box 113 \ 2 scan0076 | |
| Analysing and questioning the claimed performance figures of a 45 HP Renault. | 21th Mar 1925 | Box 113 \ 2 scan0077 | |
| Page 3 of an experimental report discussing performance test inaccuracies and suggesting the use of a Wimperis Accelerometer. | 21th Mar 1925 | Box 113 \ 2 scan0078 | |
| The methodology for calculating Renault acceleration curves. | 21th Mar 1925 | Box 113 \ 2 scan0079 | |
| Page discussing engine horsepower curves and performance characteristics. | 21th Mar 1925 | Box 113 \ 2 scan0080 | |
| The analysis of braking curves, highlighting flaws in contemporary testing methods. | 23th Mar 1925 | Box 113 \ 2 scan0081 | |
| The braking deceleration performance of the 'Vermorel' car. | 23th Mar 1925 | Box 113 \ 2 scan0082 | |
| Page discussing and critiquing brake efficiency curves from a motoring journal. | 25th Sep 1924 | Box 113 \ 2 scan0083 | |
| Mathematical calculations and test results for vehicle braking capabilities. | 23th Mar 1925 | Box 113 \ 2 scan0084 | |
| Time-velocity curve graph for a 40/50 HP open touring car, comparing it with a 45 Renault. | 26th Feb 1923 | Box 113 \ 2 scan0085 | |
| Three graphs comparing the braking curves and distances for Delage, Vermorel, and Lagonda cars. | 23th Mar 1925 | Box 113 \ 2 scan0086 | |
| Graph of braking curves for a 40/50 R.R. model, plotting road speed against time to rest. | 19th Mar 1925 | Box 113 \ 2 scan0087 | |
| Comparison of time-velocity performance curves for a Bentley Speed Model and a Vermorel 12-25. | 23th Mar 1925 | Box 113 \ 2 scan0088 | |
| Request for performance figures on 4-wheel brakes and deceleration weights for a 40/50 HP, intended for a Member of Parliament. | 23th Mar 1925 | Box 113 \ 2 scan0089 | |
| Analysis of acceleration curves for a 45 HP Renault vehicle. | 3rd Feb 1925 | Box 113 \ 2 scan0090 | |
| Theoretical shape of acceleration and deceleration curves, critiquing those published in motor journals. | 6th Apr 1925 | Box 113 \ 2 scan0091 | |
| Typed note with a handwritten correction discussing the effect of wind pressure on performance curves. | 6th Apr 1925 | Box 113 \ 2 scan0092 | |
| Car overheating complaint and related historical test data. | 2nd May 1925 | Box 113 \ 2 scan0093 | |
| New cooling test methods, results showing cars will boil, and a discussion on louvred versus shuttered bonnets. | 25th Sep 1924 | Box 113 \ 2 scan0094 | |
| Engine overheating in relation to fan belt tension and gear selection. | 14th May 1925 | Box 113 \ 2 scan0095 | |
| Page from a memo discussing how driving style can affect a car's tendency to overheat. | 14th May 1925 | Box 113 \ 2 scan0096 | |
| Chart comparing overheating test results for a Silver Ghost and a Hispano Suiza under various ventilation conditions. | 15th May 1925 | Box 113 \ 2 scan0097 | |
| The method for conducting car performance tests using a three-pen chronograph. | 25th Aug 1925 | Box 113 \ 2 scan0098 | |
| Instrumentation for performance testing, including braking, high-speed tractive resistance, and velocity/acceleration measurement. | 1st Aug 1925 | Box 113 \ 2 scan0099 | |
| From CJ to R arguing against promoting the Phantom as a speed model in favour of the company's established reputation for smoothness and silence. | 3rd Dec 1925 | Box 113 \ 2 scan0100 | |
| Confidential memorandum regarding efforts to increase the acceleration and speed of the New Phantom. | 9th Dec 1925 | Box 113 \ 2 scan0101 | |
| The acceleration performance of Mr. Geoffrey Summers' car (117-MC), compared with a standard Phantom. | 12th Dec 1925 | Box 113 \ 2 scan0102 | |
| The braking performance and gear acceleration of the Phantom. | 12th Jun 1925 | Box 113 \ 2 scan0103 | |
| Comparing the acceleration and maximum speed performance of Sunbeam and Vauxhall cars. | 12th Jun 1925 | Box 113 \ 2 scan0104 | |
| With graphs comparing the acceleration of Phantom and Vauxhall vehicles. | 12th Jun 1925 | Box 113 \ 2 scan0105 | |
| Comparing acceleration times and braking distances of model 117-MC against a standard model. | 4th Dec 1925 | Box 113 \ 2 scan0106 | |
| Hill climb test procedures and results for the 20-HP and 'New Phantom' chassis on Brockley Hill. | 24th Dec 1925 | Box 113 \ 2 scan0107 | |
| Road performance test procedures for the New Phantom chassis on various specified hills. | 7th Jan 1926 | Box 113 \ 2 scan0108 | |
| The average speeds and times for a 20 HP chassis over several test hills. | 7th Jan 1926 | Box 113 \ 2 scan0109 | |
| Performance test data for a 20 HP car on Ticknall Hill, recording times against varying ballast weights. | 19th Nov 1926 | Box 113 \ 2 scan0110 | |
| On car performance and acceleration, with a caution about the accuracy of attached comparative performance curves. | 19th Nov 1926 | Box 113 \ 2 scan0111 | |
| Two acceleration comparison charts for Open Touring Cars, one comparing high vs low compression ratios and the other comparing 20 HP vs 40/50 models. | 19th Nov 1926 | Box 113 \ 2 scan0112 | |
| Two acceleration graphs, one comparing a Rolls Royce vs a Bentley and the other comparing high vs low axle ratios. | 19th Nov 1926 | Box 113 \ 2 scan0113 | |
| Two graphs comparing acceleration performance of standard vs high compression 20 HP models. | 3rd Dec 1926 | Box 113 \ 2 scan0114 | |
| Performance tests and modifications on the 20 HP engine, comparing it to the standard Phantom. | 3rd Dec 1926 | Box 113 \ 2 scan0115 | |
| Two graphs comparing vehicle acceleration performance between a Rolls Royce Phantom and a Bentley, and between two different axle ratios on a Phantom. | 3rd Dec 1926 | Box 113 \ 2 scan0116 | |
| Two blueprint graphs comparing acceleration performance of various car models and configurations. | 3rd Dec 1926 | Box 113 \ 2 scan0117 | |
| Performance charts for a 20 HP model, showing acceleration and velocity under various configurations. | 19th Nov 1926 | Box 113 \ 2 scan0118 | |
| Fundamentals of car performance, focusing on acceleration and the factors affecting it. | 19th Nov 1926 | Box 113 \ 2 scan0119 | |
| Two graphs comparing the acceleration performance of a 20 HP engine with different compression ratios and exhaust configurations. | 19th Nov 1926 | Box 113 \ 2 scan0120 | |
| Two acceleration graphs, one comparing a Rolls Royce vs a Bentley and the other comparing high vs low axle ratios. | 19th Nov 1926 | Box 113 \ 2 scan0121 | |
| Two graphs comparing acceleration performance for different engine compression ratios and car models. | 19th Nov 1926 | Box 113 \ 2 scan0122 | |
| Comparative table of engine specifications (cylinder capacity, bore, and stroke) for various car makes. | 13th May 1927 | Box 113 \ 2 scan0123 | |
| The acceleration figures for the 20 HP car. | 13th May 1927 | Box 113 \ 2 scan0124 | |
| Hand-drawn graph showing the top gear acceleration curve for a 1924 20 HP Touring Car. | 16th Sep 1927 | Box 113 \ 2 scan0125 | |
| Responding to a complaint about a 'want of acceleration', defending the carburettor's low-speed performance over high-speed power. | 16th Sep 1927 | Box 113 \ 2 scan0126 | |
| Performance comparison report between standard and long duration camshafts, including hill climb and acceleration test results. | 20th Oct 1927 | Box 113 \ 2 scan0127 | |
| Chassis and engine improvements, evaluating options for acceleration and the number of engine cylinders. | 31th Oct 1927 | Box 113 \ 2 scan0128 | |
| Outlining proposed modifications for Phantom power development to increase performance. | 28th Nov 1927 | Box 113 \ 2 scan0129 | |
| Standardisation of the 14/52 axle ratio to increase performance. | 28th Nov 1927 | Box 113 \ 2 scan0130 | |
| Form with a list of questions regarding the fitting of a new standardised chassis part. | 19th Mar 1923 | Box 113 \ 2 scan0131 | |
| Acceleration curve, a 14-tooth axle, and the return of related blueprints. | 19th Mar 1923 | Box 113 \ 2 scan0132 | |
| Comparison tests of a 40/50 Chassis - Series F with 15/52 and 14/52 ratio axles. | 9th May 1928 | Box 113 \ 2 scan0133 | |
| Accelerometer test record graph showing performance on a chassis test rig. | 24th Apr 1928 | Box 113 \ 2 scan0134 | |
| Performance test record of a chassis, showing instrument readings from road tests. | 25th Apr 1928 | Box 113 \ 2 scan0135 | |
| Performance test accelerometer record for a 40/50 chassis on a dry, smooth London Road. | 26th Apr 1928 | Box 113 \ 2 scan0136 | |
| Accelerometer record showing performance test results for a Chrysler 75 vehicle. | 23th Jan 1929 | Box 113 \ 2 scan0137 | |
| Accelerometer record for a Chrysler 75' vehicle test. | 23th Jan 1929 | Box 113 \ 2 scan0138 | |
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