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Daimler

1960–1992 under Jaguar · most are Jaguars · two are not

A fluted grille is not an engineering difference. Only two post-1960 Daimlers carry a real Daimler engine.

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RelatedJaguar Mk2Jaguar S-Type & 420Jaguar XJ6

Not listed? Plenty of parts suit several marques and never get the model name in the title — ask us and we will check the books for you.

About the Daimler

Jaguar bought the Daimler Motor Company from BSA in May 1960 for £3.25 million, gaining the Radford factory in Coventry and a prestigious name. From then on Daimlers increasingly became Jaguars with Daimler badging rather than independently designed cars — so the practical rule is simple. The Sovereign of 1966–69 is a Jaguar 420. The Sovereign from October 1969 is an XJ6. The Double-Six is an XJ12. The DS420 limousine is a 420G floorpan stretched 21 inches, on the Jaguar 4.2. In every one of those cases what you are looking at is a grille, a mascot, a rear number-plate plinth and a better grade of wood and leather. Careful with the name “Sovereign” — it covers two completely different cars that share nothing, so always establish the year before quoting a part.

The two exceptions are real, and the 2½ Litre V8 is the one you will be asked about. That car is a Mark 2 shell with Edward Turner’s Daimler V8 in it — 2,548cc, hemispherical heads, twin SU HD6, around 140bhp, first seen in the SP250. It shares the monocoque shell, front suspension design, Burman recirculating-ball steering, the Dunlop disc layout with Lockheed servo, and the Salisbury live axle on leaf springs with the Mark 2. What is genuinely Daimler-only is the engine and its ancillaries — installation needed a reshaped sump, its own exhaust manifolds, a relocated water pump and fan, different air filters and a change from head studs to bolts — and the front springs, rated softer because the V8 is substantially lighter than the XK six. The other exception is the Majestic Major, on Daimler’s own box-section chassis with the 4,561cc Turner V8, which shares nothing with Jaguar at all.

Daimler — specification & changes within the model

Which Daimler is which Jaguar
2½ Litre V8 / V8-250 → Mark 2 shell, Daimler engine · Sovereign 1966–69 → Jaguar 420 · Sovereign from Oct 1969 → XJ6 · Double-Six → XJ12 · Vanden Plas → long-wheelbase XJ6/XJ12 · XJ-C Coupé → Jaguar XJ-C · DS420 limousine → 420G floorpan stretched 21in, Jaguar 4.2. SP250 and Majestic Major → pre-acquisition Daimler designs, nothing shared.
“Daimler Sovereign” is two different cars
1966–69 it is a Jaguar 420. From October 1969 it is an XJ6. They share nothing. Always establish the year before quoting a part.
The V8 saloon — what is shared
Monocoque shell, front suspension design, Burman recirculating-ball steering, Dunlop disc layout with Lockheed vacuum servo, Salisbury live axle on leaf springs, interior layout and basic trim fittings — all Mark 2.
The V8 saloon — what is not
The engine and its ancillaries. Installation required a reshaped sump, custom exhaust manifolds, a relocated water pump and cooling fan, different air filters and a change from head studs to bolts. Treat cooling, exhaust and induction as Daimler-only. And the front springs, rated softer because the V8 is substantially lighter than the XK six.
It does NOT have independent rear suspension
A well-known buyer’s guide says the Daimler V8-250 has independent rear suspension. It does not. It has the Mark 2’s Salisbury live axle on leaf springs, with optional Powr-Lok. The compact Jaguar with a mid-size independent rear end is the S-Type.
July 1967 — the V8-250 electrical breakpoint
Negative earth with an alternator replacing the dynamo, plus slim bumpers, twin air cleaners, a padded instrument panel, reclining seats and a heated rear window (heated and unheated screens are separate parts). Note the trim inversion: when Jaguar put Ambla in the 240 and 340, the Daimler kept its leather.
The Turner V8s
2,548cc (76.2 × 68.9mm), hemi heads, twin SU HD6, 8.2:1, around 140bhp at 5,800rpm — SP250, 2½ Litre V8 and V8-250. 4,561cc, 220bhp at 5,500rpm — Majestic Major and DR450 limousine. Neither shares anything with the XK six.
Known V8 wear points
Five-bearing crankshaft with three narrow centre bearings, prone to wear by about 40,000 miles. Rope-type rear crank oil seal. Cast-iron block with aluminium heads, so antifreeze quality matters. Oil pressure 35–45psi at 30mph, 15psi at tickover.
Chassis numbers
2½ Litre V8: RHD 1A1001–1A13377. V8-250: RHD 1K1001–1K5780. Engine prefixes 7A and 7K; body prefixes 4A and 4K. Suffixes DN (overdrive) and BW (automatic) as Jaguar. The LHD series is disputed — the factory-descended guide and the marque club give different starting numbers, so check the car.
Not claimed
Whether the Daimler V8 shell differs from the Mark 2 in any panel, aperture or glass dimension. Every source says the shell is shared; none addresses individual panels or seals. Also earth polarity before July 1967, the date the manual gearbox was introduced (February 1967 or 1968, depending on source), and exact production totals.
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