Aston Martin DB6

The Aston Martin DB6 is a grand tourer made by British car manufacturer Aston Martin and was produced from September 1965 to January 1971. The "DB" designation is from the initials of David Brown who built up the company from 1947 onwards.

The DB6 succeeded the Aston Martin DB5 and featured improved aerodynamics and specification over its predecessor.

History and design
After Aston Martin rejected proposals for a replacement for its DB5 from the original DB4 Touring of Milan, the decision was made to focus on their own development car, registered 4 YMC. Wind tunnel testing, begun in February 1965, showed development was necessary to counteract a tendency toward aerodynamic lift [a result of the fastback styling] causing reduced rear-wheel traction at high speed. Final development phases relied upon DB5 chassis, suitably lengthened and titled MP 219, with rear lip-spoiler and abbreviated Kammback tail Aston Martin previously incorporated in sports-racing prototypes. The decision was made to produce MP 219 as the Aston Martin DB6 although the prototype de Dion rear axle was rejected, Aston's soldiering on with its live-axle configuration reducing time to market, cost and complexity. Introduced at the 1965 London Motor Show, the DB6 was already a dated design notable as the first model engineered following a factory relocation from Feltham to Newport Pagnell. The DB6 has a resemblance to its predecessor, the DB5; with the most noticeable differences being its wheelbase, side profile, split front and rear bumpers and rear panels incorporating the Kammback tail rear end. The tail, combined with the relocated rear-axle and the 3.75 in lengthened wheelbase, provide more stability at high speed. Though fashionable – the rear-end Kamm-styled design was similar to the Ferrari 250 – it did not prove popular with conservative, tradition oriented Aston clientele when the DB6 was introduced. Performance was satisfactory: road-tests of the day observed top speed of the Vantage model between 145 mph to 148 mph, with John Bolster aboard a Vantage spec DB6 reaching a two-way average of 152 mph.

The DB6 continued with then high-tech Armstrong Selectaride cockpit-adjustable rear shock absorbers as available on the DB5. Other highlights include adopting front-door quarter windows, an oil-cooler air scoop low on the front valance, quarter-bumpers at each corner, revised tail-lamp clusters. Additionally, the spoiler affected the overall proportions of the DB6, with an increase in length by approximately two inches.

Other notable changes:
 * Roof line raised by two inches improving headroom especially for rear seat passengers
 * Genuinely useful leg room for rear passengers
 * More steeply raked albeit taller windscreen
 * Split front and rear bumpers
 * Standard chrome wire wheels on bias-ply whitewall tyres [in USA market]
 * Optional power steering
 * Optional air conditioning
 * Standard ZF five-speed manual unit or a BorgWarner three-speed automatic gearbox available at no extra cost
 * Optional Vantage specification retaining triple side-draft Weber 45DCOE carburettors with other minor revisions raising quoted output to 325 hp

Another major change from the DB5 to DB6 was abandonment of the full superleggera construction technique patented by coachbuilder/stylist Touring of Milan. For later DB6's construction, the more common body-on-platform technique was used; this was primarily due to the extended rear requiring a stronger and more rigid design utilizing a folded sheet metal supporting structure. Surprisingly the modifications combined to add only seventeen pounds weight compared to the DB5.

Specifications
The DB6 is powered by the 3995 cc twin-overhead camshaft (DOHC), in-line six-cylinder Aston Martin engine designed by Tadek Marek. The engine, continued with its triple SU carb setup producing 282 bhp at 5,500 rpm; the Vantage engine option is quoted at 325 bhp against the 314 bhp of the DB5. The DB6 was approximately 17 lb heavier than its predecessor, but offered better stability at high speed, added luggage capacity and added comforts for passengers. The rear suspension used helical coil springs with ride control that was adjustable from inside the car.

16 imp gallons (with optional air conditioning fitted)
 * Kerb weight: 1474 kg
 * Engine: 3.995 L straight-6
 * Compression ratio: standard=8.9:1 ; Vantage=9.4:1
 * Power: 282 hp at 5500 rpm (standard engine)
 * Power: 325 hp at 5750 rpm (optional Vantage engine)
 * Torque: 400 Nm at 4500 rpm
 * Top speed: 150 mph
 * 0–60 mph (97 km/h) acceleration: 8.4 seconds
 * Steering: rack and pinion with optional power assist
 * Fuel tank capacity: 19 imp gallons (standard)

Later models and variants
The DB6 Mark II was announced on 21 August 1969, identified by distinct flares on front and rear wheel arches and wider tyres on 1/2" wider wheels. Available as an optional extra for the Mark II was AE Brico electronic fuel-injection combined with the higher compression ratio cylinder head. The Mark II edition shared many parts with the then-new DBS.

As with previous Aston Martin models, a high-power DB6 Vantage was offered. It was equipped with three Weber carburettors and higher compression ratio cylinder head. A convertible body style was also offered, named the Volante. This was introduced at the 1966 London Motor Show. The DB6-based Volante succeeded the earlier (1965–1966) Volantes which were built on the last of the DB5 chassis' and were known as "short chassis" Volantes. Of the later DB6-based Volantes just 140 were built, including 29 high-output Vantage Volante versions, highly prized by collectors.

Charles III owns a DB6-based Volante MkII that has been converted to run on E85.

Shooting Brake
A total of six or seven DB6 Shooting-brakes were produced by British coachbuilder Harold Radford, with three more by FLM Panelcraft The engine options (282 and 325 hp) were the same as for the DB6 Saloon. 53.5 in(r) One of the Radford-built DB6 Shooting Brakes was the 1967 New York Auto Show car. The car was Roman Purple over Natural hide, LHD with factory AC, Borg-Warner automatic gearbox, LSD, Blaupunkt Köln radio with power antenna. It was purchased directly off the show stand by a Mr. S. Tananbaum for $22,500 (nearly 3x the price of a standard DB6), whose family maintained ownership until 2017. It was displayed at the 2018 Greenwich Concours d'Elegance.
 * Kerb weight: 1587 kg
 * Overall length: 180 in
 * Overall width: 66 in
 * Height: 52 in
 * Turning radius: 34 feet
 * Wheelbase: 98 in
 * Track: 54 in(f)
 * Fuel tank capacity: 16 impgal