page_title: Lotus 900 series
section_title: Type 907
hierarchical_section_title: Lotus 900 series / 900 series engine models / Type 907
caption_attribution_description: English: The engine compartment of a Jensen Healey roadster, with Lotus Type 907 twin-cam engine and Dellorto carburetors as supplied in Europe and UK.
context_page_description: The Lotus 900 series is a family of internal combustion engines designed and built by Lotus Cars of United Kingdom. Successor to the Lotus-Ford Twin Cam, the 900 was the first complete engine developed by Lotus. The engine was built from 1972 to 1999.
context_section_description: The type 907 was the first version of the 900 series to go into full production when it appeared in the Jensen-Healey in 1972. It began to appear in Lotus cars in 1975 in the Lotus Elite and was later used in the Eclat and Esprit. Bore and stroke was 95.25 mm × 69.24 mm (3 ³⁄₄ in × 2.726 in), for a total displacement of 2.0 L; 120.4 cu in (1,973 cc). The angle between intake and exhaust valves was 38°. Ignition on early engines was provided by a Lucas points and coil system, which was replaced by a Lumenition system on later engines. Breathing through two 2-barrel carburetors, engine power figures for the Jensen-Healey version were 140 hp (104 kW; 142 PS) and 155 hp (116 kW; 157 PS) as used in the early Type 75 Elites. The 907 (and the subsequent 912) were offered in several levels of tune, called `specs', that ranged from 1 to 10 with different compression ratios and power outputs.
  Even though they produced respectable power for their size and era, early 907s earned the nickname "the torqueless wonder" for their lack of bottom-end torque.
  Applications:
  1972-1976 Jensen-Healey
  1975-1976 Jensen GT
  1974-1980 Lotus Elite S1
  1975-1985 Lotus Eclat S1
  1975-1978 Lotus Esprit S1
  1978-1981 Lotus Esprit S2
caption: Jensen-Healey with Lotus Type 907 twin-cam engine and Dell'Orto carburetors.
exif: {"Image ImageDescription": "", "Image Make": "NIKON", "Image Model": "E990", "Image Orientation": "Horizontal (normal)", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "E990v1.1", "Image DateTime": "0000:00:00 00:00:00", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "284", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "300", "Thumbnail YResolution": "300", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "4084", "Thumbnail JPEGInterchangeFormatLength": "9455", "EXIF ExposureTime": "10/1017", "EXIF FNumber": "7/2", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "100", "EXIF ExifVersion": "0210", "EXIF DateTimeOriginal": "0000:00:00 00:00:00", "EXIF DateTimeDigitized": "0000:00:00 00:00:00", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "2", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "7/2", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "41/5", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2048", "EXIF ExifImageLength": "1536", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "886", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed"}