Morgan Plus 8

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Morgan Plus 8
1969MorganPlus8.jpg
Overview
Manufacturer Morgan Motor Company
Production 1968-2004
Assembly Malvern, Worcestershire, England
Body and chassis
Class Sports car
Body style 2-door roadster
Layout FR layout
Related

Morgan 4/4

Morgan +4
Powertrain
Engine 3.5L V8
3.9L V8
4.6L V8
Transmission 4-speed manual
(1968 - 1977)
5-speed manual
(1977 - 2004)
Dimensions
Wheelbase 98 in (2,489 mm)
Length 146 in (3,708 mm)
Width 57.5–67.0 in (1,460–1,702 mm)
Height 52 in (1,321 mm)
Curb weight 1,876 lb (851 kg)

The Morgan Plus 8 is a sports car built by British car makers Morgan between 1968 and 2004. Its instant and enduring popularity has been credited with saving the company and keeping the company famous during the 36 years of its manufacture. Among Morgan enthusiasts, it is deeply associated with Peter Morgan, the owner-chairman behind its design.

Design[edit]

The development of the Plus 8 was led by Maurice Owen,[citation needed] a race car engineer taken on specifically for the role. The Plus 8 prototype was based on a modified version the chassis of the Plus 4, to which it added the Rover alloy block 215 cu in (3.5 l) V8, purchased from GM-Buick in 1967. Plus 4's Moss gearbox was carried over and the Salisbury 7HA axle was uprated with a limited slip differential. The chassis was developed in stages to accommodate gearbox changes in 1973 and 1976, the body widened in 1976 to accommodate the widened chassis and the wings widened to accommodate larger tyres to handle the increasing power and trend for lower profile and wider tyres. The original 1968 Plus 8 was 57 inches (1,400 mm) wide and the last was 64 inches (1,600 mm) (with an optional "widebody" at 67 inches (1,700 mm)) For several years in the 1960s the Plus Eight was the fastest-accelerating UK production car.[1]

4.0 litre V8 engine in a 2003 Morgan Plus 8 35th Anniversary Edition

To mark the 35th year of production of its Plus 8, MMC released a commemorative 'Anniversary Edition' in 2003.

Engines[edit]

The original Plus 8s engines were based on the Rover V8 which had been bought by Rover. Morgan was the first of a succession of sports car makers- including the likes of TVR and Marcos- to use the engine, which Rover had only just made available in the P5B saloon.[2]

The Plus 8 development car used a Rover V8 block and the Plus 8 was launched in 1968 using Rover's production engine, itself a re-engineered version of the Buick 215 block (renamed the 3.5 L by Rover) with a compression of 10.5:1 fueled by two SU HS6 carburettors. By 1973, the Rover 3500 saloon was available with a manual 4 speed gearbox and this engine/gearbox configuration was adopted by Morgan although the compression dropped to 9.25:1 with a resulting loss of power. With the adoption of an improved version of the block developed for the Rover SD1 in 1977, compression was increased to 9.35:1 and power increased. After 1981 the engine was fueled by two Stromberg carburettors, .

At the end of 1983, the company offered an EFI version using a Bosch L-Jetronic based system. With the added power (204 bhp (152 kW; 207 PS)) and low weight, the Plus 8 was, according to the magazine road tests of the day, able to best a Porsche up to 90 mph (140 km/h). In 1990, a 3.9 L version of the block was added using the Lucas 14CUX fuel injection system.

In 1996, a 4.6 L version found its way into the car as an option, still using the 1CUX system. From 2000, all Morgan Plus 8s were fueled by the GEMS system as used on the Range Rover P38a between 1994 and 1999.

On the 2012 Geneva Motor Show, Morgan introduced a new edition of the Plus 8 roadster, powered by a 4.7L BMW V8-Engine.

United States sales[edit]

For almost two decades during the 1950s and 1960s, North America took the greater bulk of Morgan production. Popularity in the UK and Europe had greatly fallen during that era. The era ended with the advent of the strong emission and structural laws. Luckily, the failure of the modern looking +4+ and the arrival of the powerful Plus 8 rekindled interest in the home market in the whole line.

In the US, a way was found to keep importing Morgans after 1974. From 1974 to 1992, all imported Morgans (of which 98% were Plus 8s) to the United States were converted by independent dealers, especially Bill Fink, to run on propane as fuel to pass the U.S. emissions regulations.[3][4][5]

When the Rover Group re-certified their V-8 engine for use in the Range Rover SUV sold in the U.S., Morgan made a gasoline-powered +8 available with the same engine in the same tune and with the same anti-emission devices.[citation needed] As safety regulations continue to change, Morgan was again challenged in 2006 to meet the new structural requirements announced by the NHTSA in 2000. A request for an exemption to the law on airbags was refused and the importation of traditional (classic) Morgans ceased.[6]

Gearboxes[edit]

A 1993 Morgan Plus 8
  • 1968-1972 Moss gearbox, a 4-speed manual transmission with synchromesh 2nd, 3rd, and 4th.
  • 1972-1977 Rover 3500s, 4-speed all-synchromesh manual transmission used in the Rover 3500S saloon.
  • 1977-1995 Rover LT77, 5-speed all-synchromesh manual transmission
  • 1995-2004 Rover R380, 5-speed all-synchromesh manual transmission
  • 2012 6-speed manual transmission (6-speed automatic transmission optional)

References[edit]

  1. ^ Simister, John (2009-03-24). "Morgan 4/4 Sport v Lotus Eco Elise". Evo.co.uk. Retrieved 2011-06-25. 
  2. ^ "Fuelling the passion", Octane: 71–76 
  3. ^ "Reprint of Car & Driver article, January 1977". Morgancars-usa.com. Retrieved 2011-06-25. 
  4. ^ "AUTOS ON MONDAY/Collecting; The Mystique of the Eccentric Morgan - New York Times". Nytimes.com. 2004-04-05. Retrieved 2011-06-25. 
  5. ^ Lorne M. Goldman. "madeintheusa". Gomog.com. Retrieved 2011-06-25. 
  6. ^ "NHTSA Denial of application for a temporary exemption from air bag provisions of Federal Motor Vehicle Safety Standard No. 208, Occupant Crash Protection". Federal Register. Retrieved 2011-06-25.