The Grand Tourer Built to Cross Continents in Comfort

The Citroën SM looked like nothing else on the road in 1970, with a low nose, covered headlights, and a Maserati-built V6 tucked under the hood. What made it a true grand tourer wasn't the engine alone. It was the hydropneumatic suspension borrowed from Citroën's sedan lineup, a system of nitrogen-filled spheres and hydraulic fluid that let the car float over potholes and railroad crossings that would send a normal car's occupants bouncing. Drivers who piloted an SM from Paris toward the Alps discovered something unusual: washboard roads that rattled other cars felt almost smooth. The suspension adjusted ride height on the fly, keeping the body level even when loaded with luggage for a long trip. That was the entire promise of grand touring laid out in one car. Speed mattered, but so did arriving without a sore back or a spilled drink. The SM proved comfort and distance could be engineered together, not treated as a trade-off.

Grand touring didn't start with comfort in mind. In the 1930s, cars like the Alfa Romeo 8C 2900 were built to win endurance races across Italy, with thin bodies, minimal padding, and engines tuned purely for speed. Anything that added weight without adding lap time got left off the car entirely. By the late 1960s, the definition had flipped. The Ferrari 365 GTB4 Daytona kept the racing pedigree, capable of reaching speeds well past 170 miles per hour, but it also came with air conditioning, leather seating, and a cabin quiet enough for conversation at highway speed. The shift wasn't an accident. Wealthy buyers wanted a car that could win a hillclimb on Saturday and cross France on Sunday without punishing them for it. Speed alone stopped being enough. Stamina became just as important, and the cars that mastered both became the template every grand tourer after them tried to follow.

Crossing a continent without constant fuel stops meant grand tourers needed tanks that dwarfed typical sedans. The Mercedes-Benz 450SEL 6.9 carried around 24 gallons of fuel, giving it a range that let drivers push deep into a day's drive before searching for a station. Most family sedans of the same era carried closer to 16 or 18 gallons, forcing more frequent stops on a long trip. The 6.9 also borrowed a self-leveling hydropneumatic suspension, license-built with input from Citroën's patents, which kept the big sedan stable at speed even fully loaded with passengers and luggage. Under the hood sat a 6.9-liter V8 that made the car feel unhurried on the Autobahn despite its size. None of this was about chasing a spec sheet. It was about a very specific kind of buyer who wanted to drive from Munich to Monte Carlo in one push, arriving relaxed instead of wrung out.

The Citroën SM and the British-built Jensen Interceptor took very different paths to the same result. The SM leaned on hydropneumatic suspension that could raise or lower the entire body depending on load and speed, smoothing out surfaces that would otherwise jolt passengers awake. The Jensen took a more brute-force approach, pairing a Chrysler V8 with a chassis tuned for long-distance stability rather than outright cornering grip. Neither car handled like a sports car in the tightest sense, and that was intentional. Grand tourers weren't built to carve canyon roads. They were built to make six hours in the car feel like two. Passengers in these cars could genuinely doze off on rough secondary roads that would keep occupants of an ordinary sedan gripping the door handle. That kind of engineered calm, rather than raw handling precision, became one of the clearest signatures separating a true grand tourer from a merely fast car.

It's easy to assume grand touring was strictly a European habit, built around Alpine passes and Autobahn stretches. American automakers had their own version, just aimed at a different kind of distance. The Buick Riviera, introduced in the early 1960s, combined a long hood with a plush cabin meant for cruising two-lane highways between cities separated by hundreds of miles. The Lincoln Continental Mark III followed a similar formula later in the decade, prioritizing a smooth ride and a quiet cabin over sharp handling. Neither car was chasing European road-course pedigree. They were built for Route 66-style distance, where the challenge wasn't a mountain switchback but eight straight hours of flat highway. The suspension tuning, seat design, and even the placement of controls reflected that goal. American grand tourers proved the concept wasn't about matching a European spec sheet. It was about matching the distances American drivers actually faced.

The 1973 oil crisis hit grand tourers harder than almost any other category of car. Vehicles like the Jensen Interceptor, with its thirsty Chrysler V8, suddenly looked like a liability at the pump rather than a status symbol. Classic car mechanics who worked on these cars during that era often point out that owners weren't necessarily unhappy with the cars themselves, they simply couldn't justify the fuel bills anymore. Tightening emissions regulations added another problem, forcing manufacturers to choke down big engines just to meet new standards, which sapped the effortless power that made long hauls feel easy. Automakers responded by shrinking engines and trimming weight, but that often meant sacrificing the plush suspension tuning and cabin isolation that defined the breed. Jensen itself shut down production of the Interceptor in the mid-1970s. The grand tourer didn't disappear because buyers stopped wanting comfort over distance. It disappeared because the economics of building that comfort stopped making sense almost overnight.

The grand tourer's DNA didn't vanish with the 1970s fuel crisis, it just migrated into a new generation of cars. The modern Bentley Continental GT carries the same basic promise as the Citroën SM or the Ferrari Daytona: enough power to cross a continent quickly, and enough engineering underneath to make the trip feel effortless rather than exhausting. Adaptive air suspension has taken over the job hydropneumatic systems once handled, smoothing out rough pavement while still allowing sharp handling when a driver wants it. Cabins now include massaging seats and cabin air filtration, updates to the same goal Mercedes chased with the 450SEL decades earlier. Collectors still hunt down originals from the 1960s and 1970s specifically because that era captured something modern cars, for all their technology, still chase. The idea that a car could carry someone a thousand miles in comfort was never a passing trend. It was a standard, and it's still the standard enthusiasts measure new grand tourers against today.