HQ
The HQ series of 1971 was a completely new design, introducing larger capacity 173-cubic-inch (2.85 L) and 202-cubic-inch (3.3 L) six-cylinder engines, with the continued availability of 253-cubic-inch (4.2 L), 308-cubic-inch (5.0 L) Holden and 350-cubic-inch (5.7 L) Chevrolet V8 engines.[2] HQ was the most radically engineered Holden since the introduction of the original 48-215 model of 23 years prior. It featured a perimeter frame and semi-monocoque (unibody) construction, and was the first full-size Holden to have coil spring rear suspension.[3] As a cost-saving measure, HQ was only engineered for right-hand drive, hence it was not feasible to sell the car in left-hand drive markets. Thus Holden exports declined from 41,181 in 1973 to just 7,440 in 1975. Over the following years this led to a large decline in export vehicle revenue needed to fund the HQ-HZ series replacement.[4] Despite this, HQ became Holden's most popular car, selling 485,650 units, a total yet to be surpassed in a Holden. It was however, sold over a longer timeframe than previous models.[2][5]
At the time, Holden's then Chief Engineer, an American named George Roberts, insisted that the HQ Holdens should "ride like a Cadillac" and that the front suspension be engineered to make the car prone to understeer for "safety reasons".[6] Advertising of the car promoted its "jet-smooth ride" over rough roads.[7] Notwithstanding persistent criticism from many motoring journalists, this policy persisted with the subsequent HJ and HX facelift models. It was arguable whether Australian buyers favoured this engineering philosophy and it was not until the 1977 HZ facelift that radical changes were made to the suspension to improve handling.[8]
In Mid 1972, Holden released a limited edition version of the HQ Belmont sedan, named 'SS' Adopted from Chevrolet Super Sport Models in the United States and other markets, Option code 'XV2' Included the choice of three very 70's Colours: Infra Red (Dark Orange), Lettuce Alone (Light Green) or Ultraviolet (Purplish - Grey Metallic), Vinyl Stripe and 'SS' Decal kit supplied by 3M Australia, a choice between 253 (4.2L) or 308 (5.0L) Holden V8 engine mated to a 4 Speed Manual Gearbox backed by a 10-Bolt Salisbury Differential with a 3.36:1 Ratio (and painted.. unusually, White, Along with the driveshaft), along with Pontiac-style Rallye weels. On the inside: Standard Black Belmont Door trims, Optional armrests, However, unusual to the Belmont, A full Sport Gauge Cluster, Steering Wheel, Carpet, Floor Shift, Center Console and Bucket Seats in Black Vinyl with Houndstooth or Flax inserts, The SS was initially limited to 1800 units, but extended by 1300 due to unprecedented sales demand.
In late 1972, Holden released a special edition version of the HQ Kingswood sedan and wagon, named Kingswood Vacationer.[9] This value package of options proved popular and made return appearances on various Holden models during the next twenty years or so. Holden, in 1974 introduced the Sandman, a version of the utility or panel van designed to incorporate many of the features of the Monaro, such as sports instrumentation, sports steering wheel and bucket seats, and "rally" road wheels with a choice of two six-cylinder and two V8 engines. Other available options included automatic transmission, power steering, and air-conditioning. Sandmans were visually identified by stick-on vinyl decals on the exterior. It gained notoriety during the latter half of the 1970s as a mobile venue for sexual intercourse. Vans earned nicknames as shaggin' wagons and sinbins.
In 1971 CKD HQ production started in Thailand. HQ's were also CKD manufactured in Indonesia and the Philippines for many years. There was also a program for Mazda in Japan to produce the HQ from CKD kits, which is believed not to have gone beyond the pilot stage.
HJ
Released in 1974, the HJ series received some major frontal appearance styling changes, taking away some of the "softness" of the HQ cars. HJ saw the Belmont name disappear off utilities and panel vans to be replaced with an "unbadged" specification. HJ also saw the demise of separate models for V8 powered variants, for example in HQ a V8 Kingswood sedan had model code 0469 and its six-cylinder version was 0369. In HJ all Kingswoods were a single model—WN69—regardless of engine. Engine displacement was now expressed in metric terms, and the 202 cuin six-cylinder engine became the standard power unit for all Kingswood variants and higher luxury levels. The 2.84 L six remained the standard engine for the entry-level Belmont and "unbadged" commercials.[10] As with the engine, the Belmont also saw the omission of front disc brakes, now a standard fitment on all Kingswood models.
A couple of special-build variants emerged later in production, initially with the Kingswood Deluxe sedan in July 1975 and later the Kingswood Vacationer II sedan and wagon in November 1975.[10] Added features for these cars included automatic transmission, radial tyres, floor carpeting, radio, and a range of two-tone body colours.
Some HJ series Premier based vehicles were assembled by Mazda in Japan, which fitted with the company's rotary engine
HX
The HX series release of 1976 saw only minor updates to the exterior, notably the grille and badgework, although base specification utilities and panel vans retained the HJ grill (except Sandman which got HX Kingswood frontal treatment). When the HX was released, government emissions controls had been tightened and Holden needed to make significant changes to their engines. This resulted in a loss of performance across the range and the deletion of the 2.84-litre straight-six. In addition, a Kingswood panel van was introduced to the range of commercial vehicle offerings. The HX Sandman introduced a large 'Sandman' logo on the tailgate and stripes down the sides. During the course of the HX series, front bucket seats were adopted as standard equipment for Kingswood-badged vehicles. As with the previous series, a couple of special-build HX Kingswood variants emerged later in production, initially with the Kingswood 50th Anniversary sedan in November 1976 and also a repeat appearance of the Kingswood Deluxe sedan.
HZ
The 1977 HZ series received minor updates to the exterior, and saw the introduction of what Holden termed "Radial Tuned Suspension" (RTS) on all models. RTS made significant changes to the suspension of the car, greatly improving the handling finesse, while at the same time not compromising ride quality.[14] Modern Motor magazine described the HZ as "a great handler spoiled by the car" in a comparison against the BMW 528i, contrasted as "a great car spoiled by the handling".[15] To illustrate, photos were taken of the Holden cornering hard but smoothly, while the BMW spun out of control. However BMW forced the magazine to admit that it had instructed its test driver to throw the BMW into the corner at much higher speed and in a deliberately unstable attitude. In this series, the lower-end Belmont was deleted and the Kingswood became the base model for sedans and wagons, with a new model the slightly more upmarket Kingswood SL introduced. Commercial vehicles—the ute, panel van and cab chassis—were not affected by the rationalisation, with the practice of "unbadged" commercial vehicles continuing. During the course of the HZ series, equipment levels were upgraded in 1978 effectively to match improvements in the opposition Ford Falcon range, but the life of the Kingswood looked set to end following Holden's release of the VB Commodore range of sedans and wagons in November 1978. After 1980, Kingswood passenger cars were cancelled—replaced by the downsized Commodore.
WB
The last Holden to wear the Kingswood badge was one of the variants of the WB series utility released in 1980. Although the WA and WB projects at Holden were meant to have resulted in all-new full-size cars, the 1973 fuel crisis and cost-cutting meant the scope of changes became more limited each time. Eventually, the WB project was condensed into a major upgrade of the luxury Statesman models and a facelift of the HZ-series commercial models with new headlights, tail lights, grilles and the updated Holden "Blue" six-cylinder engine (4.2-litre V8 optional). The Kingswood was now available on utility only with the panel van joining the One Tonner, but the 5.0-litre V8 engine was no longer officially offered as an available performance option although some were built. There were no passenger car versions of the Kingswood, their place in the Holden range having been absorbed by the Commodore. Production of the entire WB-series finished in 1985 when Holden announced they were vacating local production of large luxury and commercial vehicles due to economics to concentrate on their medium car range, i.e. Camira and Commodore, and imported Isuzu commercial product.