Renamed 420G for 1966 to avoid confusion with the smaller 420, this same-generation car sold in under a third the numbers.
Median 101 hp across 410 similar cars
Lead trim: 420G 4.2 XK six (4235 cc)
Jaguar Mark X and 420G1961–1970
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Nobody in Burbles has spotted a Jaguar Mark X and 420G yet. See one on the street, point the app at it, and the first card is yours — with your @handle permanently credited on this page.
FactRenamed 420G for 1966 to avoid confusion with the smaller 420, this same-generation car sold in under a third the numbers.
The Jaguar Mark X (Mark Ten), later renamed the Jaguar 420G, is a large luxury saloon manufactured by Jaguar between 1961 and 1970 (3.8 Litre 13,382, 4.2 Litre 5,137, 420G 5,763), succeeding the Mark IX as the top of the range but breaking radically with its predecessors in both styling and technology. Its ponton-shaped body, with an upright, slightly forward-leaning grille flanked by quad round headlights, became the template for the 1968 XJ6 and for Jaguar saloons for nearly half a century; introduced within a year of the E-Type, it copied much of that car's technology, with integrated unitary bodywork (the largest in the UK at the time), four-wheel disc brakes and Jaguar's independent rear suspension with inboard brakes, unprecedented for early-1960s British luxury cars. Power initially came from the E-Type's 3781 cc XK six with triple carburettors, 250 or 265 bhp depending on compression ratio, for a capability of 120 mph at less than half the price of a Rolls-Royce Silver Cloud. For the London Motor Show in October 1964 the enlarged 4,235 cc unit took over (the 3.8 could still be specified until October 1965) together with a new all-synchromesh four-speed gearbox and a Borg-Warner Type 8 automatic in place of the DG, and 4.2 cars received Marles Varamatic variable-ratio steering. For the October 1966 London Motor Show the Mark X was renamed the 420G (not to be confused with the smaller 420); despite running for the same five years it sold in less than a third of the numbers, and it was run out of production in 1970 as the XJ6 arrived.
Collectors Spotted in the Jaguar Mark X Lineage
No member has published a public street spot of the Jaguar Mark X yet — the First · Worldwide stamp is wide open.
Trims & Figures
3 published trims in the catalogue. A blank is a figure not recorded, not zero.
| Trim | Years | Engine | Power | Torque | 0–60 | Drive | Gearbox | MSRP |
|---|---|---|---|---|---|---|---|---|
| 420G 4.2 XK six (4235 cc) | 1966–1970 | 4.2 L Inline-6 | 265 hp | 283 lb-ft | — | RWD | — | — |
| Mark X 3.8 XK six (3781 cc) | 1961–1965 | 3.8 L Inline-6 | 265 hp | 260 lb-ft | — | RWD | — | — |
| Mark X 4.2 XK six (4235 cc) | 1964–1966 | 4.2 L Inline-6 | 265 hp | 283 lb-ft | — | RWD | — | — |
Owning one
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Owners’ builds
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Photographs
Rivals
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