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Cars Review of the Alfa Romeo 156 with the JTS Engine
http://uk.cars.yahoo.com/car-reviews/car-and-driving/alfa-romeo-156-2.0-jts-1003349.html
Alfa’s Jet Thrust Stoichiometric engine:
In the dawn of time, 1994 to be exact, Alfa launched their 2.0-litre twin spark engine. Here was a power plant that did exactly what it said on the cam cover, boasting two spark plugs per cylinder to give a cleaner, more efficient and, as its an Alfa, a more powerful combustion process. We loved the Twin Spark engine but progress being what it is, this technology was considered cappello vecchio by Alfas product planners, hence the JTS power plant.
This utilises the principle of direct gasoline injection as used by Mitsubishi with their GDI engines and Renault with their HPI range of power units. These fire fuel into the cylinder on the inlet stroke and meter their petrol ration minutely for optimum swirl, burn and happy customer. This lean running results in superb economy, but these engines have traditionally had an Achilles heel. The pistons and inlet ports are designed for low-down economy, and the engine reverts to a normal or stoichiometric mix of air and fuel when you plant the loud pedal. Research has shown that Alfa owners enjoy doing this. A lot.
"The Alfa 156 JTS is proof positive of Darwin’s Theory of Evolution."
Therefore, the normal gasoline direct engine just wouldn’t wash. The JTS engine, on the other hand, uses relatively normal shaped pistons and inlet ports and relies on the actual fuel jet and a sky-high compression rate to do the job instead. Therefore, the JTS engine runs super-lean only up to around 1,500rpm, and normally thereafter. To the untrained eye, this would suggest that the Alfa 156 is the perfect sporting car for those who spend most of their time stuck in nose to tail traffic but there’s more to it than that.
10% more power is always welcome, as is 14% more torque than the Twin Spark unit it replaces. When you factor in superior fuel economy and better emissions, it seems the Alfa 156 JTS is proof positive of Darwin’s Theory of Evolution.
http://uk.cars.yahoo.com/car-reviews/car-and-driving/alfa-romeo-156-2.0-jts-1003349.html
Alfa’s Jet Thrust Stoichiometric engine:
In the dawn of time, 1994 to be exact, Alfa launched their 2.0-litre twin spark engine. Here was a power plant that did exactly what it said on the cam cover, boasting two spark plugs per cylinder to give a cleaner, more efficient and, as its an Alfa, a more powerful combustion process. We loved the Twin Spark engine but progress being what it is, this technology was considered cappello vecchio by Alfas product planners, hence the JTS power plant.
This utilises the principle of direct gasoline injection as used by Mitsubishi with their GDI engines and Renault with their HPI range of power units. These fire fuel into the cylinder on the inlet stroke and meter their petrol ration minutely for optimum swirl, burn and happy customer. This lean running results in superb economy, but these engines have traditionally had an Achilles heel. The pistons and inlet ports are designed for low-down economy, and the engine reverts to a normal or stoichiometric mix of air and fuel when you plant the loud pedal. Research has shown that Alfa owners enjoy doing this. A lot.
"The Alfa 156 JTS is proof positive of Darwin’s Theory of Evolution."
Therefore, the normal gasoline direct engine just wouldn’t wash. The JTS engine, on the other hand, uses relatively normal shaped pistons and inlet ports and relies on the actual fuel jet and a sky-high compression rate to do the job instead. Therefore, the JTS engine runs super-lean only up to around 1,500rpm, and normally thereafter. To the untrained eye, this would suggest that the Alfa 156 is the perfect sporting car for those who spend most of their time stuck in nose to tail traffic but there’s more to it than that.
10% more power is always welcome, as is 14% more torque than the Twin Spark unit it replaces. When you factor in superior fuel economy and better emissions, it seems the Alfa 156 JTS is proof positive of Darwin’s Theory of Evolution.
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THE
STUNNING 53BARCHETTA HAS BEEN CREATED TO CAPTURE THE PASSION INVOKED BY
THE ORIGINAL CLASSIC MASERATI A6GCS/53.