page_title: Toyota R engine
section_title: 18R-G
hierarchical_section_title: Toyota R engine / History of the R family / 18R / 18R-G
caption_attribution_description: English: Big Mike Muniz TE27 Rally Car with a 152E TRD race engine
context_page_description: The Toyota R family was a series of inline-four gasoline automobile engines. Designed for longitudinal placement in such vehicles as the Celica and Hilux and in production from 1953 through 1997, usage faded out as many of Toyota's mainstream models moved to front-wheel drive. Overhead cam versions featured a chain-driven camshaft.
context_section_description: The 8-valve DOHC 18R-G and its variations were produced from 1973 to 1982, replacing the 8R-G and providing a performance engine which took advantage of the entire 2-litre limit of Japan's "small car" class. While most 18R-Gs had a head designed and made by Yamaha, a very few had Toyota heads. Yamaha's tuning-fork logo can be seen on the Yamaha heads. Except for the head and related timing components, most parts were shared or interchangeable with the SOHC 18R. Combustion chambers were hemispheric.
  In 1975, air injection was added to the Japan-market 18R-GR for improved emissions. This used Solex carburettors. A fuel injected and catalyzed Japan-market version, the 18R-GEU, was produced from 1978 through 1982. There was also a catalyzed carburetted version, the 18R-GU.
  Competition versions of the 18R-G and -GE include those used in rally Celicas of the period, one of which finished second in the 1977 RAC Rally. These had four-valve heads and were called 152E, they were of 89 mm × 80 mm (3.50 in × 3.15 in) bore and stroke and 1,995 or 1,998 cc (121.7 or 121.9 cu in) (depending on the source). The Group 4 rally version of the 152E had two twin-choke carburettors, and developed 240 PS (177 kW; 237 hp) at 9000 rpm. Higher tuned engines developed as much as 300 PS (221 kW; 296 hp) at 9,200 rpm. German racing team Schnitzer also developed a turbocharged silhouette racing version of the Celica, to take on the Porsche 935. With a KKK  turbocharger, the Group 5 Celica developed 560 PS (412 kW; 552 hp) but reliability was less than satisfactory.
  Applications:
  1973–1981 Toyota Celica GT 2000
  1982–1983 Toyota Celica GT 2000 (RA63)
  1974–1983 Toyota Carina GT 2000
  1978–1983 Toyota Celica Camry GT 2000
  1973–1982 Toyota Corona GT 2000
caption: Big Mike Muniz 1973 TE27 Rally Car with a 152E TRD Race Engine
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