Bristol 404 and 405

Bristol 404 Bristol 405
Bristol 405 four-door saloon
Overview
Manufacturer	Bristol Aeroplane Co. (now Bristol Cars)
Production	1953–1958 52 Bristol 404 units 308 Bristol 405 units
Body and chassis
Class	Luxury car
Body style	Two-door coupé (404) Four-door saloon (405) Two-door drophead coupé (405)
Layout	FR layout
Powertrain
Engine	1,971 cc ohv I6 2,216 cc ohv I6
Chronology
Predecessor	Bristol 403
Successor	Bristol 406

The Bristol 404 and Bristol 405 are British luxury cars which were manufactured by the Bristol Aeroplane Company. The 404 was manufactured from 1953 to 1958, and the 405 from 1955 to 1958. The models were successors to the Bristol 403. The 404 was a two-seat coupé and the 405 was available as a four-seat, four-door saloon and as a four-seat, two-door drophead coupé.

Unlike previous or later Bristol models, there is considerable confusion in nomenclature when it comes to the Bristol 404 and 405. The 404 was a very short-wheelbase (8 feet (2,438 mm) as against 9 feet 6 inches (2,896 mm)) version of the 405, but was introduced in 1953, whereas the 405 was not introduced until 1955 and continued until 1958.

The 405 itself was seen in two versions. The more common (265 of 308 built) is a four-door saloon built on the standard chassis of the previous Bristols, whilst the 405 drophead coupé or 405D (43 built) had a coupé body by Abbotts of Farnham and most built had a highly tuned (through advanced valve timing) version of the 2 litre six-cylinder engine called the 100C which developed 125 bhp (93 kW) as against the 105 bhp (78 kW) of the standard 100B 405 engine. All engines for the 404 and 405 had higher compression ratios than previous Bristols — 8.5:1 as against 7.5:1.

Compared to the 403, the 404 and 405 had an improved gearbox with much shorter gear lever which improved what was already by the standards of the day a very slick gearchange. The 405, though not the 404, had overdrive as standard apart from the earliest models, and front disc brakes became an option apart from the earliest models, and were fitted to almost all 405 drophead coupés. A few late 405s were fitted with the torquier 2.2 litre engine introduced in the later 406.