Sixty-five years ago, on Christmas Eve in Pesaro, people were raising their glasses not only to celebrate the holiday, but also to welcome the first thunderous bursts of an engine that would go on to make history in world motorcycle racing. It would later be perfected by Grassetti, Provini, and Pasolini. It has now been 65 years since that memorable night of December 24, 1960, when the deafening roar of new four-cylinder Benelli 250 GP engine was heard for the very first time in Pesaro on Christmas Eve.
As if following an ancient ritual, crowds gathered outside the factory gates on Viale Mameli even before midnight Mass. Everyone wanted to hear for themselves the powerful “voice” of the latest multi-cylinder racing machine. To its mechanical accompaniment, locals uncorked bottles of sparkling wine, celebrating the birth of a future champion.
The motorcycle itself, ridden by Silvio Grassetti, had already been shown to the international press six months earlier, in June, at the company’s private test track in the Marche region. Management had an ambitious goal: to debut in both the Italian Championship and the World Championship during the 1961 season.
Unexpected Difficulties
Reality, however, had other plans. Internal company problems, including the serious illness of Giuseppe Filippucci (the outstanding engineer behind Dario Ambrosini’s championship-winning machines and a key builder of the new engine), along with significant teething problems in the engine itself, forced the Benelli family to revise their schedule.
Development of the 250 Grand Prix project continued around the clock, but its official debut had to be postponed. It finally took place on April 25, 1962, at Imola.
Just one week later, on May 1, a sensation followed. Grassetti scored a historic victory in the international pre-season race at Cesenatico. After crashing in the opening laps, the Italian staged an incredible comeback and overtook Honda’s factory stars Tom Phillis, Jim Redman, and Luigi Taveri before the finish. Also left behind were the famous Morini duo of Tarquinio Provini and Franco Tassinari, as well as strong competitors on Bultaco, Ducati, Aermacchi, and CZ machinery.
The Beginning
On the very same motorcycle used at Cesenatico, with only its sectional fairing changed and without even opening the engine for inspection, the Pesaro team loaded the machine into a van and headed for Barcelona. The World Championship opened on May 6 with the Spanish Grand Prix at the Montjuïc street circuit.
There, Grassetti came close to performing a miracle. For many laps, the Italian led confidently while holding off Honda’s formidable factory armada, Bob McIntyre, Jim Redman, Tom Phillis, Luigi Taveri, Tommy Robb, Teis Kitano, and Nello Pagani, as well as a tightly packed group of riders on Yamaha, Morini, MZ, Suzuki, Aermacchi, Bultaco, Adler, CZ, and Jawa motorcycles. But heartbreak struck at the finish: a burnt valve forced the Pesaro rider to retire.
The German Grand Prix at Hockenheimring followed, and once again misfortune struck the Italians. Grassetti led the field until the penultimate lap, only to finish fourth after running short of fuel.
Even so, the lion-emblazoned brand was once again on everyone’s lips and on the front pages of the world’s motorsport press. Benelli had returned to the elite ranks with the most advanced and powerful 250cc machine of its day, entrusted to Italy’s brightest young road-racing talent.
A Return in Pursuit of Glory
The years from 1962 to 1969 became a truly fiery era for the company, a period of great triumphs and bitter disappointments.
In fact, the factory had returned to major racing at the end of 1958. Until then, the marque had been absent since 1951, when its leader and reigning 250cc World Champion Dario Ambrosini was tragically killed at Albi. Incidentally, the rider from Cesena had previously repeated the pre-war sporting exploits of the legendary Tonino Benelli almost exactly.
The appearance at the Nations Grand Prix in Monza on September 14, 1958, was only an exploratory effort. The team was testing a new four-stroke, DOHC single-cylinder 250cc machine redesigned by engineer Aulo Savelli for the 1959 season.
This quarter-liter racer, developed through the hands of Silvio Grassetti and later ridden by Mike Hailwood, Geoff Duke, Dick Dale, and Bruno Spaggiari, was magnificent. The rapid single-cylinder machine produced 32 horsepower at 12,000 rpm and could reach 210 km/h (Grassetti recorded an average lap speed of more than 175 km/h at Monza). Yet it could no longer repeat the triumphs of its legendary 1950 predecessor.
It had arrived too late. While its riders won local races in Italy, on the international stage they were constantly forced to defend against stronger opposition: twin-cylinder MV Agustas, updated single-cylinder Morinis, four-cylinder Hondas, and increasingly powerful two-stroke machines from Yamaha, MZ, Suzuki, and Bultaco featuring rotary-disc induction and reed valves.
A New Chapter in History
That was why the decision was made in Pesaro to retire the successful but increasingly outdated single-cylinder model. In strict secrecy, the factory began work on an entirely new project: the four-cylinder Benelli 250.
Young Grassetti, who had already become the 1956 Italian Champion on the Leoncino 125 and had impressed during the 1958-1959 seasons, was personally informed about the new machine in early 1960 by racing department chief Mimo Benelli. He secretly led the “Lion of Montecchio” (Grassetti’s nickname) into one of the isolated workshops of the vast Viale Mameli factory, where engineer Aulo Savelli was completing the design of the new quarter-liter racer.
Shortly afterward, in the foundry, Silvio saw the freshly cast components of the future engine for the first time. He later admitted that he felt on top of the world. He was absolutely convinced that he would soon be riding a truly unbeatable machine.
Especially because twenty years earlier Benelli had already achieved remarkable results with a supercharged 250cc four-stroke inline-four developed before World War II. The machine had been tested by the famous rider Salvatore Baronciani, but never competed officially because postwar regulations prohibited supercharging.
The Project Comes of Age
The new naturally aspirated machine was built on an entirely different technical level, uncompromising, advanced, and original. Every component was a unique engineering creation. Design work was carried out entirely in-house, and most parts were handcrafted by factory specialists.
In that era, the 250cc class was rightly regarded as the pinnacle of Grand Prix racing. The four-cylinder machine from Pesaro (not counting the later 350cc and 500cc derivatives ridden by Renzo Pasolini, Mike Hailwood, Jarno Saarinen, Walter Villa, and Grassetti himself) permanently secured its place among the greatest Grand Prix motorcycles of all time.
Much of that recognition is owed to the exceptional riders who forged the brand’s glory:
- Silvio Grassetti — carried the enormous burden of debuting and developing the four-cylinder machine during the crucial years from 1961 to 1963.
- Tarquinio Provini — a true racing legend and former rider for Mondial, MV Agusta, and Morini. One of the most technically knowledgeable and innovative riders of his generation. His brilliant career ended after a horrific crash at the Isle of Man TT on August 25, 1966.
- Renzo Pasolini — fearless fighter, crowd favorite, and the principal ideological rival of Giacomo Agostini.
- Kel Carruthers — the Australian ace who delivered the motorcycle’s ultimate championship triumph.
Other riders who competed on the machine included Amilcare Ballestrieri, Walter Villa, Eugenio Lazzarini, Angelo Bergamonti, Remo Venturi, Gilberto Parlotti, and Phil Read. Spaniard Santiago Herrero also tested the machine extensively in Modena, though his potential long-term relationship with the marque was cut short by his fatal TT accident.
The people behind this extraordinary adventure deserve equal recognition. First among them was engineer Aulo Savelli. Alongside refining the DOHC single-cylinder racer, he began sketching the new four-cylinder machine in 1958 at Giovanni Benelli’s request, progressing from a blank sheet of paper to a race-ready motorcycle in just two years.
The Foundation of the Project
The project was carried out by a small but remarkably cohesive team: technician Armaroli, veteran engine specialists Filippucci and Marocchini from the Dario Ambrosini era, and chassis expert Ivo Mancini. Later they were joined by a new generation: Primo Zanzani, the former chief designer and driving force behind Motobi’s racing department; the very young Giancarlo Cecchini; and, during the Provini years, Omer Melotti, who headed the department, alongside Cecchini, who became the team’s “golden man.”
The company’s management structure was as follows:
- Giovanni Benelli — chief strategist.
- Mimo Benelli — general organizer and administrator.
- Paolo Benelli (son of the legendary Tonino) and Count Innocenzo Nardi Dei — race-team managers.
Although only about ten mechanics worked directly in the racing department, the entire factory of more than a thousand employees was effectively involved in building the machine. Such dedication is almost unimaginable in the modern industry.
Technical Portrait of the Racer
The Benelli 250 GP represented the cutting edge of engineering in its era. Contrary to many contemporary designs, its inline-four engine featured vertically arranged cylinders and air cooling. The crankcase and major structural components were cast from a special lightweight alloy.
Engine and Transmission
- Bore × stroke: 44 mm × 40.6 mm.
- Displacement: 247.2 cc.
- Valve train: DOHC with two inclined valves per cylinder and coil springs. The camshafts were driven by a central gear train. A four-valve-per-cylinder configuration would be introduced later during the Pasolini era.
- Primary drive: gear-driven. The smaller driving gear was mounted on the crankshaft between the first and second cylinders on the left side.
- Transmission: dry multi-plate clutch and six-speed gearbox. Benelli later developed a seven-speed transmission and even experimented with an eight-speed unit.
- Fuel system: four Dell’Orto carburetors with 20 mm venturis.
- Ignition: battery-powered system with four coils and a four-contact breaker.
- Lubrication: dry-sump system with an external oil tank.
Chassis and Performance
- Frame: tubular duplex frame derived from the earlier single-cylinder racer.
- Brakes: entirely made from lightweight alloy. At the front was an effective four-leading-shoe drum brake with twin actuation. Later, in 1965, Provini’s Benelli became the first Grand Prix motorcycle in history to race with disc brakes.
- Wheels and tires: 2.50×18 inches front, 2.75×18 inches rear.
- Dry weight: 122 kg.
- Performance: the first version of the engine produced 37 horsepower at 12,500 rpm. With its aluminum fairing, the machine exceeded 220 km/h, an absolute world-class figure for the quarter-liter category.
Legacy
After countless upgrades and what was effectively a complete rebirth, the four-cylinder Benelli 250 remained at the forefront of world motorcycle racing. Seven years after its debut, in the legendary 1969 season, when Silvio Grassetti finished runner-up in the 350cc World Championship aboard a factory two-stroke Jawa four-cylinder, second only to Giacomo Agostini on an MV Agusta, the Australian Kel Carruthers finally delivered the long-awaited World Championship title for Benelli.
Statistics of the Fiery Era (1962-1969)
- Results: The racing machine crossed the finish line 150 times and recorded 50 victories, including 10 Grand Prix wins.
- Geography of Triumphs: Memorable victories came at some of the world’s toughest circuits, including the Isle of Man TT, Spa, Monza, Imola, Cesenatico, the Nürburgring, Le Mans, Assen, and Abbazia.
- Titles: One World Championship (Carruthers) and five Italian Championship titles (two for Provini, two for Pasolini, and one for Grassetti). The machines from Pesaro were almost never absent from the podium.
- Peak Performance: In its final evolution, the engine produced more than 55 horsepower (some engineers claimed as much as 60 hp) at an astonishing 17,000 rpm. It was physically capable of approaching 20,000 rpm, while top speed significantly exceeded 250 km/h.
Yet even those figures seemed insufficient to the ambitious Italians. In complete secrecy, Benelli’s engineers in Pesaro were already designing the ultimate weapon, a four-stroke V8 displacing only 250cc, intended to crush the Japanese factories and rewrite motorsport history. However, new restrictions introduced by the international federation’s technical regulations buried the bold plans of the legendary “House of the Little Lion” (Casa del Leoncino).
Even today, in Pesaro and its surrounding area, memories of that remarkable Christmas night in 1960 remain alive. Elderly locals still greet one another in dialect with the question, “T’arcord?” (“Do you remember?”).
And the city answers in unison with Fellini’s immortal phrase:
“Amarcord!” — “I remember!”
