| Description | Date | Identifier | |
| Test report on engine fuel consumption and power output at various carburettor and magneto settings. | 21th Sep 1911 | Box 147 \ 5 scan0015 | |
| Dynamometer consumption experiments showing wasteful consumption with a rich mixture. | 2nd Dec 1911 | Box 147 \ 5 scan0016 | |
| Comparative consumption tests on chassis 1414 with two different geared axles, 18x52 and 16x52. | 1st Jan 1906 | Box 147 \ 5 scan0017 | |
| Performance and fuel consumption for car number 6 during the 1906 Scottish trials. | 1st Jan 1906 | Box 147 \ 5 scan0018 | |
| Notes on a fuel consumption test for car No. 6, with varying weights and gearing. | 14th Feb 1907 | Box 147 \ 5 scan0019 | |
| Petrol consumption test results under various conditions for two different cars. | 14th Feb 1907 | Box 147 \ 5 scan0020 | |
| 250-mile road test in the Wales district detailing fuel consumption, road conditions, and load. | 2nd Mar 1907 | Box 147 \ 5 scan0021 | |
| Fuel consumption test results for a car with a large test body. | 2nd Mar 1907 | Box 147 \ 5 scan0022 | |
| Note detailing a test run from Manchester to York and back, recording passengers and fuel consumption. | 16th Jan 1909 | Box 147 \ 5 scan0023 | |
| Record of petrol consumption tests with various engine heat configurations and radiators. | 16th Jan 1909 | Box 147 \ 5 scan0024 | |
| Observations from road tests on different car series. | 18th Dec 1908 | Box 147 \ 5 scan0025 | |
| Log of heat and fuel consumption tests conducted by Lowe. | 30th Nov 1908 | Box 147 \ 5 scan0026 | |
| Remarks on a road test between Matlock and Osmaston, detailing radiator blocking and speeds. | 30th Nov 1908 | Box 147 \ 5 scan0027 | |
| Remarks on a series of vehicle tests noting consumption, temperature, and carburettor adjustments. | 30th Nov 1908 | Box 147 \ 5 scan0028 | |
| Notes on a trial run and race performance for car T.T. No. 4 after an engine overhaul. | 9th Jun 1906 | Box 147 \ 5 scan0029 | |
| Calculation of vehicle weight and fuel efficiency for a 250-mile trip to Wales. | 17th Jun 1909 | Box 147 \ 5 scan0030 | |
| Fuel consumption bench test results comparing different spirits on an engine at 1000 revs. | 17th Jun 1909 | Box 147 \ 5 scan0031 | |
| Letter detailing the results of petrol consumption tests on two different chassis. | 1st Oct 1912 | Box 147 \ 5 scan0032 | |
| Petrol consumption tests and comparing performance against a 60 HP Napier vehicle. | 5th Oct 1912 | Box 147 \ 5 scan0033 | |
| Departmental memo regarding petrol consumption tests and attached reports. | 8th Oct 1912 | Box 147 \ 5 scan0034 | |
| Departmental memo querying the petrol consumption for a specific run, with a handwritten reply. | 8th Oct 1912 | Box 147 \ 5 scan0035 | |
| Departmental memo regarding the petrol consumption results of a run, achieving 15 miles per gallon. | 14th Oct 1912 | Box 147 \ 5 scan0036 | |
| Reporting on petrol consumption and Mr. Royce's remarks on the desirability of a 16-tooth pinion. | 29th Oct 1912 | Box 147 \ 5 scan0037 | |
| Carburettor, gearbox and clutch performance for Chassis 2300. | 8th May 1913 | Box 147 \ 5 scan0038 | |
| From F.H.R. to C.J. discussing performance issues and adjustments for Chassis 2301. | 16th May 1913 | Box 147 \ 5 scan0039 | |
| Extract from a memo regarding carburettor adjustment issues and high fuel consumption on Chassis 2300. | 20th May 1913 | Box 147 \ 5 scan0040 | |
| Departmental memo from Vienna to Derby sending performance records for car 2260 and statements for cars 2224 and 2212. | 22th Jul 1913 | Box 147 \ 5 scan0041 | |
| Confirming the handover of records regarding petrol consumption during the Austrian Trials. | 26th Jul 1913 | Box 147 \ 5 scan0042 | |
| Request for petrol consumption particulars from the Austrian Trials. | 15th Aug 1913 | Box 147 \ 5 scan0043 | |
| Incorrect advert information concerning fuel consumption, carburettors, and engine gearing related to the Spanish Grand Prix. | 2nd Sep 1913 | Box 147 \ 5 scan0044 | |
| Engine efficiency, fuel consumption, carburetters, and the benefits of higher compression. | 2nd Sep 1913 | Box 147 \ 5 scan0045 | |
| Engine performance improvements, carburetter testing, and the potential for a twin-valved engine. | 2nd Sep 1913 | Box 147 \ 5 scan0046 | |
| The efficiency of large propellers and why aeroplane engines run at lower speeds. | 2nd Sep 1913 | Box 147 \ 5 scan0047 | |
| Chasing Mr. Hives for a delayed response regarding petrol consumption on Austrian Trials Cars. | 11th Sep 1913 | Box 147 \ 5 scan0048 | |
| Comparison of performance records for cars 2224 and 2212 during the Austrian Trials, detailing routes, distance, time, speed, and fuel consumption. | 16th Sep 1913 | Box 147 \ 5 scan0049 | |
| Forwarding of a report on the petrol consumption of the Austrian Trials Cars. | 17th Sep 1913 | Box 147 \ 5 scan0050 | |
| Typed copy of a memo regarding the satisfactory petrol consumption figures from the Austrian Trials and a suggestion to publish them. | 23th Sep 1913 | Box 147 \ 5 scan0051 | |
| From F.H.R. requesting tests on petrol consumption with engine coolant at boiling temperature. | 2nd Jan 1914 | Box 147 \ 5 scan0052 | |
| Tests showing the effect of water temperature on fuel consumption and engine performance. | 16th Jan 1914 | Box 147 \ 5 scan0053 | |
| Engine performance related to water temperature, noting issues with cold seizures and proposing an automatic water temperature regulator. | 16th Jan 1914 | Box 147 \ 5 scan0054 | |
| Tabular comparison of engine performance at 50°C and 100°C water temperatures. | 21th Aug 1915 | Box 147 \ 5 scan0055 | |
| High petrol consumption in Car 58NA, detailing adjustments made to the carburetter jets and suggesting further observation. | 21th Aug 1915 | Box 147 \ 5 scan0056 | |
| Improvements to petrol consumption and starter motor design for car 58NA. | 6th Oct 1915 | Box 147 \ 5 scan0057 | |
| From R. to J. discussing parts testing and a proposed alteration to the starter system. | 9th May 1916 | Box 147 \ 5 scan0058 | |
| Experiments and suggestions for improving petrol economy in car engines. | 9th May 1916 | Box 147 \ 5 scan0059 | |
| Car testing, ignition points, and methods to improve fuel consumption. | 16th May 1916 | Box 147 \ 5 scan0060 | |
| Increased petrol consumption after fitting front wheel brakes and a request for a solution. | 7th May 1925 | Box 147 \ 5 scan0061 | |
| Petrol consumption for the 'U' series chassis, testing various choke valve settings. | 15th May 1925 | Box 147 \ 5 scan0062 | |
| Drawing and notes for the adjustment of the exhaust throttle control on U.S. engines. | 14th Feb 1928 | Box 147 \ 5 scan0063 | |
| Report on 'U' Series Chassis petrol consumption. | 21th May 1925 | Box 147 \ 5 scan0064 | |
| Covering memo requesting information on petrol consumption for the 'U' Series Car. | 19th Jun 1925 | Box 147 \ 5 scan0065 | |
| Request for further particulars on the petrol consumption tests for the 'U' Series, referenced in Circular Notice No. 440. | 19th Jun 1925 | Box 147 \ 5 scan0066 | |
| Clarifying the context of petrol consumption tests for 'U' series cars following criticism from Sales. | 22th Jun 1925 | Box 147 \ 5 scan0067 | |
| Letter to Dunlop Rubber Co. requesting technical data on the rolling resistance of tyres. | 30th Oct 1925 | Box 147 \ 5 scan0068 | |
| Consumption tests for the Phantom model. | 23th Nov 1925 | Box 147 \ 5 scan0069 | |
| The method for petrol consumption tests on the New Phantom. | 21th Nov 1925 | Box 147 \ 5 scan0070 | |
| The methodology and results of petrol consumption tests. | 12th Jun 1925 | Box 147 \ 5 scan0071 | |
| Factors influencing petrol consumption and economy. | 12th Aug 1925 | Box 147 \ 5 scan0072 | |
| The method for conducting petrol consumption tests on a New Phantom. | 12th Jun 1925 | Box 147 \ 5 scan0073 | |
| Petrol consumption tests, analysis, and results. | 12th Jun 1925 | Box 147 \ 5 scan0074 | |
| Factors affecting petrol consumption and vehicle economy. | 12th Jun 1925 | Box 147 \ 5 scan0075 | |
| The possibilities of improving fuel economy for the Phantom model. | 21th Nov 1925 | Box 147 \ 5 scan0076 | |
| Car performance, specifically detailing the factors affecting petrol consumption. | 21th Nov 1925 | Box 147 \ 5 scan0077 | |
| Graph showing the thermal efficiency of a 4-stroke petrol engine against its load, with an analysis for the Phantom model. | 21th Nov 1925 | Box 147 \ 5 scan0078 | |
| Gear ratios, detailing their effect on fuel economy and engine work with accompanying graphs. | 17th Jun 1925 | Box 147 \ 5 scan0079 | |
| Petrol consumption, focusing on the effects of acceleration and four-wheel brakes. | 12th Jun 1925 | Box 147 \ 5 scan0080 | |
| Carburation and petrol consumption, including a graph of engine performance. | 21th Nov 1925 | Box 147 \ 5 scan0081 | |
| Thermal efficiency, carburettor settings, and ignition advance, with a graph illustrating brake load versus spark advance. | 21th Nov 1925 | Box 147 \ 5 scan0082 | |
| Page discussing engine friction, rolling resistance, and factors for achieving maximum petrol economy. | 21th Nov 1925 | Box 147 \ 5 scan0083 | |
| Schematic diagram of a flow meter for measuring petrol consumption. | 24th Nov 1925 | Box 147 \ 5 scan0084 | |
| Showing the effects of speed, tyre pressure, and mixture control on petrol consumption. | 24th Nov 1925 | Box 147 \ 5 scan0085 | |
| Set of graphs showing the effects of ignition advance, axle ratio, and engine temperature on petrol consumption. | 24th Nov 1925 | Box 147 \ 5 scan0086 | |
| Fuel economy possibilities for the Phantom model, discussing friction and thermal efficiency. | 21th Nov 1925 | Box 147 \ 5 scan0087 | |
| Study of theoretical and actual improvements in fuel economy for the Phantom model. | 24th Nov 1925 | Box 147 \ 5 scan0088 | |
| Car performance, focusing on petrol consumption and optimum driving speed. | 21th Dec 1945 | Box 147 \ 5 scan0089 | |
| Featuring a graph on the thermal efficiency of a 4-stroke petrol engine related to the Phantom model. | 12th Jun 1925 | Box 147 \ 5 scan0090 | |
| Gear ratios, showing their effect on petrol consumption and indicated horsepower. | 12th Jun 1925 | Box 147 \ 5 scan0091 | |
| Petrol consumption, focusing on acceleration and four-wheel brakes. | 21th Nov 1925 | Box 147 \ 5 scan0092 | |
| Page discussing carburation and its effect on petrol consumption and engine performance, with a corresponding graph. | 12th Jun 1925 | Box 147 \ 5 scan0093 | |
| Thermal efficiency, carburettor settings, and ignition advance, including a graph of brake load vs spark lead. | 12th Jun 1925 | Box 147 \ 5 scan0094 | |
| Factors affecting fuel consumption, including engine friction, rolling resistance, and tyre types. | 21th Nov 1925 | Box 147 \ 5 scan0095 | |
| Experiments to improve petrol consumption by heating the throttle and the air supplied to the carburetter. | 25th Nov 1925 | Box 147 \ 5 scan0096 | |
| Letter acknowledging receipt of an experimental report on Phantom consumption tests. | 15th Dec 1925 | Box 147 \ 5 scan0097 | |
| Petrol consumption of the Phantom chassis compared to the Silver Ghost. | 8th Nov 1926 | Box 147 \ 5 scan0098 | |
| Petrol consumption test results for an AR.75 aluminium engine under different carburetion settings. | 11th Oct 1927 | Box 147 \ 5 scan0099 | |
| The running conditions and testing of Super Sports Engine No. S.S.3. | 18th Oct 1928 | Box 147 \ 5 scan0100 | |
| Engine modifications and performance issues, including the exhaust, timing gears, pistons, and oil system. | 18th Oct 1928 | Box 147 \ 5 scan0101 | |
| Proposed modifications to address oil leaks, crankcase pressure, and valve mechanism noise. | 18th Oct 1928 | Box 147 \ 5 scan0102 | |
| Graph of petrol consumption curves for a Super Sports Engine. | 18th Oct 1928 | Box 147 \ 5 scan0103 | |
| Graph showing the Super Sports engine power curve with various test configurations. | 9th Oct 1928 | Box 147 \ 5 scan0104 | |
| Petrol consumption of an S.S. car. | 14th Feb 1930 | Box 147 \ 5 scan0105 | |
| Alarming increase in petrol consumption, proposing bench tests on different carburetter types to investigate the issue. | 10th Jul 1930 | Box 147 \ 5 scan0106 | |
| Carburation and ignition timing adjustments related to a Phantom II model. | 28th Jul 1930 | Box 147 \ 5 scan0107 | |
| Consumption test report for chassis 18-G-IV and 21-G-IV over a 112-mile course. | 30th Apr 1934 | Box 147 \ 5 scan0108 | |
| Consumption tests comparing vehicles 21-G-IV and 18-G-IV, including fuel usage and performance on hills. | 1st May 1934 | Box 147 \ 5 scan0109 | |
| Carburettor consumption tests for models 21-G-IV and 18-G-IV over a specified course. | 2nd May 1934 | Box 147 \ 5 scan0110 | |
| Comparison of fuel consumption tests between a carburettor from 'Wor's car' and a new production type. | 31th May 1934 | Box 147 \ 5 scan0111 | |
| Consumption test comparison between car models 21-G-IV and 17-G-IV. | 6th Jun 1934 | Box 147 \ 5 scan0112 | |
| Results of a Chevrolet consumption test. | 7th Oct 1936 | Box 147 \ 5 scan0113 | |
| Comparative report on oil and petrol consumption for car models 32-EX and 36-EX using various oil types. | 13th Nov 1936 | Box 147 \ 5 scan0114 | |
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