Jaguar XK150 values: the S premium, roadster over drophead over coupé, and a market that has halved since 2019

The XK150 is the last and most usable of the XKs, and XK150 values are the widest spread of any Jaguar on this site: 628 recorded sales since 1994, about 40 a year lately, at a median of £60,500, with the middle half between £41,900 and £85,000. Seven in ten of the cars offered find a buyer. The spread runs from a £2,500 project to £761,600 for the Bertone-bodied one-off of 1958, and between a 3.4 fixed-head coupé at £38,000 and a 3.4 S roadster at £95,500 the same car’s price changes by a factor of two and a half on its engine and its body alone.

The XK150 model guide covers the disc brakes, the 3.4, 3.8 and S engines, the three bodies and what to check. This page is about the money, and about a market that has more than halved in real terms since 2019.

S over standard, roadster over drophead over coupé

The variant table on this page is the longest in the Jaguar record, because the XK150 came in three bodies, two engines and three states of tune, and the market prices every combination differently. The order is consistent. The body sets the first rung: among the 3.4 cars the roadster and the drophead sit level at about £65,000 at the median, across 38 and 41 sales, while the fixed-head coupé sits at £38,000 across 59. The engine sets the second: the 3.8 lifts a coupé to £57,800, a drophead to £86,250 and a roadster to £92,500. And the S, the straight-port head with triple carburettors that gave 250 bhp in 3.4 form and 265 in 3.8, sets the third: a 3.4 S coupé sits at £61,900, a 3.4 S drophead at £70,900 and the 3.4 S roadster, 68 sales, at £95,500, the highest median of any standard XK150. The SE, the earlier mild upgrade, adds a little to each.

The reasons are the ones the whole XK market shares. The roadster is the rarest body and the purist’s car; the drophead, with its proper hood and wind-up windows, the most usable open one; the fixed-head the most numerous and the most practical. The S cars are the fastest XKs built and the ones with competition credibility, and because the badge is worth so much, the market treats every S as a claim to be proven. At the very top, the best 3.8 S roadsters pass £150,000 and the record’s upper quartile for the 3.8 roadster is £188,000; at the bottom a sound 3.4 coupé is the most affordable way into a 1950s Jaguar sports car.

What moves the price of an XK150

Identity first, because the XK150’s value sits in its specification. The chassis number, the engine number, the head and the carburettors checked against the heritage certificate are the start of any serious price, and the market is unforgiving of cars whose S or SE status rests on a badge: a genuine S with its original engine and straight-port head sells far above one with the parts added later, however well. Then the steering wheel. The great majority of XK150s were built left-hand drive for America, and a genuine home-market right-hand-drive car sells at a premium in Britain of perhaps ten to twenty per cent, with a converted car, declared, somewhere between; an undeclared conversion is the fastest way to lose a sale.

Then the body, which on an XK150 is the XK120’s separate chassis and steel body with wider shoulders, and which rusts at the sills, the floors, the inner wings, the door posts and the boot floor. A full restoration at a specialist runs well into six figures, which is why the £90,000 restored drophead is a car somebody else has paid for and the £30,000 project rarely the bargain it looks. Originality and matching numbers add; the usual upgrades, a five-speed gearbox, modern cooling and electronic ignition, are accepted by the users who make up most of the XK150’s buyers and marked down by the collectors who set its top prices. Mileage, on a car that has always been restored, means nothing.

Half the value it had in 2019

The chart shows the clearest fall in the XK record. The yearly median was around £30,000 to £40,000 through the 2000s, rose with the boom to £80,300 in 2015 and £83,400 in 2019, the peak, and sat around £70,000 in 2021 and 2022. It then fell to £59,000 in 2023, £53,700 in 2024 and £48,200 in 2025, with the 2026 figure so far a little above that. Restated in today’s money the XK150 has lost more than half its value since 2019 and nearly two-fifths since 2021.

The sample effect is small here, because an XK150 has never been an online-auction bargain in the way a Midget is; the fall is mostly real, and the cause is the one the XK120 and the Healey share: a 1950s sports car whose buyers are leaving the market while the buyers who follow have E-Types in mind. The S cars and the roadsters have held up best, because they are scarce and the collectors still want them; the standard 3.4 and 3.8 coupés, restored in the boom years and back in the sale rooms now, have fallen hardest, and a single week in late July and early August 2026 saw three of them sell between £15,200 and £22,200 on the online platforms, figures that would have bought a project in 2019.

Where XK150s change hands

The record is mostly American, because the cars were, and the best S roadsters and the coachbuilt one-offs go through the international auction houses and set the headlines. The standard cars are split between the online platforms on both sides of the Atlantic, the catalogued sales in Britain and the Jaguar specialists, and a month in July 2026 shows the spread: a 3.4 S roadster at £75,700 online in America, a 3.4 SE coupé at £45,000 on a British platform, and 3.4 and 3.8 coupés between £15,200 and £22,200 on both. Whether a recorded price includes the buyer’s premium varies by sale, which is one more reason to read the usual range rather than any single result.

Insuring, restoring, selling

For an agreed-value policy a good standard car belongs around its version’s median and a restored one in the upper half of the range; an S car is insured on its provenance, because the gap between a proven S and a converted one is the whole of its premium. On restoration the arithmetic is the XK120’s: a six-figure rebuild produces a car worth less than the sum unless the car is an S roadster, so the sensible buy is the finished car at today’s reduced prices, and a coupé bought well is the cheapest good XK there is. If you are selling, the spring is the season, the heritage certificate and the engine number are what the buyer checks first, and the realistic expectation is the median for the version, not the figure the car was insured for in 2019.

Related

The XK150 closed the line the XK120 opened and the XK140 carried, and the three now sit within a few thousand pounds of each other at the median; the E-Type that replaced it sells for a little less at the median and far more at the top. For the decade, see British classic cars of the 1950s. For how all the figures on this site are compiled, see what classic cars sell for.