Pontiac Bonneville IV gallery (1965–1970)

The fourth-generation Bonneville characterized by dramatic Coke-bottle styling, luxurious long-wheelbase bodies, and colossal 455 V8s.

All photos 53 I 10 1957–1958 II 0 1959–1960 III 0 1961–1964 IV 29 1965–1970 V 0 1971–1976 VI 0 1977–1981 VII (G-body) 0 1982–1986 VIII (H-body) 0 1987–1991 IX (H-body) 0 1992–1999 X (G-body) 8 2000–2005

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Spanning the 1965 through 1970 model years, the fourth-generation Pontiac Bonneville represented the golden era of full-size American muscle cruisers on GM's full-size B-body architecture. It featured fluid Coke-bottle contours, dramatic fastback roof profiles on coupes, and vertically stacked headlamps that transitioned to horizontal clusters late in the cycle. Body configurations included two-door hardtops, two-door convertibles, four-door pillared and pillarless sedans, and Safari wood-grained wagons. The powertrain lineup was monumental: initially powered by 389 and 421 V8s, Pontiac upgraded to all-new 400 cubic inch (6.6L) and 428 cubic inch (7.0L) engines for 1967, culminating in the massive 455 cubic inch (7.5L) V8 generating 370 hp for 1970. Power was transmitted via the ultra-reliable 3-speed Turbo Hydra-Matic 400 automatic or available 3-speed/4-speed manual transmissions. Annual facelifts occurred throughout, notable for the switch to horizontal headlights and integrated loop bumpers in 1969-1970. Marketed across North America, the fourth generation remains one of the most celebrated executions of large luxury touring sedans.