The Holden HT Monaro continued the success of Holden’s original HK Monaro coupe, refining the formula of strong performance, distinctive styling and practical everyday usability. Introduced in 1969, the HT series carried forward the Monaro’s reputation as one of Australia’s most recognised performance coupes while offering a range of engine and equipment choices.
Buyers could choose from several engine and transmission combinations depending on whether they preferred economical six-cylinder performance or the increased power of a V8 engine. The Monaro and Monaro GTS models also included a wide range of optional equipment and performance upgrades, allowing customers to tailor the car to their preferred driving style.
HT Monaro Engine Options
The HT Monaro range offered several engine choices across both six-cylinder and V8 configurations.
Available engines included:
• 161 cubic inch six-cylinder engine
• 186 cubic inch six-cylinder engine
• 186S high performance six-cylinder engine
• 253 cubic inch V8 engine
• 307 cubic inch V8 engine
Key engine specifications included:
• 161 engine — bore and stroke 3.375 in × 3.00 in, approximately 145 bhp
• 186 engine — bore and stroke 3.625 in × 3.25 in, approximately 165 bhp
• 186S engine — higher performance version of the 186 with improved carburetion
• 253 V8 — stroke 3.0625 in, approximately 185 bhp
• 307 V8 — stroke 3.25 in, approximately 210 bhp
Fuel capacity for HT Monaro models was approximately 16.5 gallons.
Transmission Options
Several transmission configurations were available depending on engine and model specification.
Transmission choices included:
• Three-speed manual transmission with column shift
• Four-speed manual transmission with floor shift
• Powerglide automatic transmission
Monaro GTS models were commonly equipped with the four-speed manual gearbox, giving drivers greater control over engine performance.
Suspension and Steering
The HT Monaro retained Holden’s proven suspension design which combined good handling stability with ride comfort.
Key suspension and steering features included:
• Independent front suspension with coil springs
• Front stabiliser bar on V8 models
• Semi-elliptic rear leaf springs
• Telescopic shock absorbers
• Optional power steering
This layout provided predictable handling characteristics and good road control under both normal driving and higher performance conditions.
Braking System
Braking systems varied slightly depending on model and equipment specification.
Braking features included:
• Dual circuit hydraulic braking system
• Power assisted brakes available
• Front disc brakes standard on Monaro GTS models
• Rear drum brakes
The use of front disc brakes on performance models improved stopping performance compared with earlier drum brake systems.
HT Monaro Wheels and Tyres
Wheel and tyre combinations were selected to suit the vehicle’s performance capabilities.
Typical tyre options included:
• 6.95 × 14 tyres for six-cylinder models
• 7.35 × 14 tyres for V8 models
• Nylon high-speed tyres on GTS performance models
Optional rally wheels and performance tyres were also available.
HT Monaro Interior and Equipment
The Monaro interior was designed to combine sporting character with driver comfort.
Interior features included:
• Bucket seats in Monaro GTS models
• Centre console with floor mounted gear lever
• Optional tachometer
• Push button transistor radio
• Deluxe heater and demister
• Laminated windscreen
• Fully padded dashboard and interior trim
Optional accessories such as air conditioning, sports wheel discs and rally stripes allowed buyers to personalise their vehicle.
While this guide helps identify common specifications and features of the HT Monaro, the Holden workshop manuals available from Car Manuals Direct include the original specifications, adjustment settings and repair procedures used by Holden mechanics when servicing HT Holden vehicles and their standard mechanical components.