2006 F1 Engine!

Only 4-stroke engines with reciprocating pistons are permitted.
Engine capacity must not exceed 2400 cc.
Supercharging is forbidden.
All engines must have 8 cylinders arranged in a 90º “V” configuration and the normal section of each cylinder must be circular.
Engines must have two inlet and two exhaust valves per cylinder. Only reciprocating poppet valves are permitted. The sealing interface between the moving valve component and the stationary engine component must be circular.
The total amount of recoverable energy stored on the car must not exceed 300kJ, any which may be recovered at a rate greater than 2kW must not exceed 20kJ.
Engine dimensions:Cylinder bore diameter may not exceed 98mm. Cylinder spacing must be fixed at 106.5mm (+/- 0.2mm).The crankshaft centreline must not be less than 58mm above the reference plane.
Weight and centre of gravity: The overall weight of the engine must be a minimum of 95kg. The centre of gravity of the engine may not lie less than 165mm above the reference plane. The longitudinal and lateral position of the centre of gravity of the engine must fall within a region that is the geometric centre of the engine, +/- 50mm.
Only one fuel injector per cylinder is permitted which must inject directly into the side or the top of the inlet port.
Electrical systems: Ignition is only permitted by means of a single ignition coil and single spark plug per cylinder. The use of plasma, laser or other high frequency ignition techniques is forbidden.
Only conventional spark plugs that function by high tension electrical discharge across an exposed gap are permitted. Spark plugs are not subject to the materials restrictions
The primary regulated voltage on the car must not exceed 17.0V DC.
Engine actuators: With the following exceptions hydraulic, pneumatic or electronic actuation is forbidden: a) Electronic solenoids uniquely for the control of engine fluids; b) Components providing controlled pressure air for a pneumatic valve system; c) A single actuator to operate the throttle system of the engine.
Engine auxiliaries: With the exception of electrical fuel pumps engine auxiliaries must be mechanically driven directly from the engine with a fixed speed ratio to the crankshaft.
Engine intake air:
Other than injection of fuel for the normal purpose of combustion in the engine, any device, system, procedure, construction or design the purpose or effect of which is any decrease in the temperature of the engine intake air is forbidden.
Other than engine sump breather gases and fuel for the normal purpose of combustion in the engine, the spraying of any substance into the engine intake air is forbidden.
Materials and construction – Components:
Pistons must be manufactured from an aluminium alloy which is either Al-Si; Al-Cu; Al-Mg or Al-Zn based.
Piston pins must be manufactured from an iron based alloy and must be machined from a single piece of material.
Connecting rods must be manufactured from iron or titanium based alloys and must be machined from a single piece of material with no welded or joined assemblies (other than a bolted big end cap or an interfered small end bush).
Crankshafts must be manufactured from an iron based alloy. No welding is permitted between the front and rear main bearing journals. No material with a density exceeding 19,000kg/m3 may be assembled to the crankshaft.
Camshafts must be manufactured from an iron based alloy. Each camshaft and lobes must be machined from a single piece of material. No welding is allowed between the front and rear bearing journals
Valves must be manufactured from alloys based on Iron, Nickel, Cobalt or Titanium. Hollow structures cooled by sodium, lithium or similar are permitted.
Reciprocating and rotating components: a) Reciprocating and rotating components must not be manufactured from graphitic matrix, metal matrix composites or ceramic materials. This restriction does not apply to the clutch and any seals; b) Rolling elements of rolling element bearings must be manufactured from an iron based alloy; c) Timing gears between the crankshaft and camshafts (including hubs) must be manufactured from an iron based alloy.

-Source (FIA Website)