Technical Bravo Power
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Technical Bravo Power
the book figure is 103bhp, but peak power figures mean very little. your particular example could have a peak of 80-100bhp. more importantly the 1.6 has 106lb/ft of torque, which is good for a 1.6, and even more importantly the torque curve is fairly flat so you have plenty of usable torque across a good chunk of the rev range, that is what gives the 1.6 its willingness,
from the fiat brochure:
The Torque 1.6 16-valve engine
This is a technically sophisticated four cylinder in-line 1581 cc unit which delivers 103 bhp-EC at 5750 rpm and 106 lb.ft of torque at 4000 rpm. Its distinctive feature is a 4-valves per cylinder head with twin overhead camshafts driven by a toothed belt. Hydraulic tappets for automatic valve clearance adjustment and an automatic timing belt tensioner are also fitted.
The engine has a notably efficient torque curve - hence its name - with as much as 90% of peak torque available between 2500 and 5500 rpm.
Special care was taken in the development of this unit to optimise fluid dynamics. CAD-CAE mathematical computer simulation programmes were used to define the shape and dimensions of the intake and exhaust manifolds to optimise the mixing and division of the fuel/air split among the cylinders.
The same amount of care was also devoted to the design of the combustion chambers, whose geometry was defined to reduce harmful exhaust emissions to a minimum and to optimise combustion, and to the design of the cylinder head cooling circuit, the efficiency of which is fundamental for lasting reliability.
Other interesting features are:
- the 'long branch' (400 mm) geometry of the intake manifold, ensuring an optimal delivery curve at low and medium RPM.
- the fitting of a new type of piston which contributes significantly to noise reduction;
- a new MPI Weber-Marelli integrated electronic management system with static ignition and sequentially phased, self-adapting injection and new fuel injectors, and a new Marelli central computer unit specifically developed to ensure better response and exhaust emissions control in all conditions.
Highly innovative casting and machining process techniques were used to build some of the components. For example:
- by using the new 'policast' process it has been possible to cast the oil passages to the hydraulic tappets and the camshaft mountings. This translates into optimised channel geometries and simpler component manufacture (Fiat Auto patent);
- the process of polishing the cylinder liners with a 'plateau' finish keeps engine oil consumption extremely low.
from the fiat brochure:
The Torque 1.6 16-valve engine
This is a technically sophisticated four cylinder in-line 1581 cc unit which delivers 103 bhp-EC at 5750 rpm and 106 lb.ft of torque at 4000 rpm. Its distinctive feature is a 4-valves per cylinder head with twin overhead camshafts driven by a toothed belt. Hydraulic tappets for automatic valve clearance adjustment and an automatic timing belt tensioner are also fitted.
The engine has a notably efficient torque curve - hence its name - with as much as 90% of peak torque available between 2500 and 5500 rpm.
Special care was taken in the development of this unit to optimise fluid dynamics. CAD-CAE mathematical computer simulation programmes were used to define the shape and dimensions of the intake and exhaust manifolds to optimise the mixing and division of the fuel/air split among the cylinders.
The same amount of care was also devoted to the design of the combustion chambers, whose geometry was defined to reduce harmful exhaust emissions to a minimum and to optimise combustion, and to the design of the cylinder head cooling circuit, the efficiency of which is fundamental for lasting reliability.
Other interesting features are:
- the 'long branch' (400 mm) geometry of the intake manifold, ensuring an optimal delivery curve at low and medium RPM.
- the fitting of a new type of piston which contributes significantly to noise reduction;
- a new MPI Weber-Marelli integrated electronic management system with static ignition and sequentially phased, self-adapting injection and new fuel injectors, and a new Marelli central computer unit specifically developed to ensure better response and exhaust emissions control in all conditions.
Highly innovative casting and machining process techniques were used to build some of the components. For example:
- by using the new 'policast' process it has been possible to cast the oil passages to the hydraulic tappets and the camshaft mountings. This translates into optimised channel geometries and simpler component manufacture (Fiat Auto patent);
- the process of polishing the cylinder liners with a 'plateau' finish keeps engine oil consumption extremely low.
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