Turbocharged 4-Cylinder vs V6

Engines

In recent years, turbocharged engines have become a

major part of the automotive landscape. As automakers
look to increase fuel efficiency to appeal to modern
drivers, many naturally aspirated V-6 engines have been
replaced or joined by turbocharged 4-cylinder units
within a particular vehicle’s range. Although there are
typically fuel-efficiency benefits tied to the use of
turbocharged 4-cylinder engines, naturally aspirated V-6
units also have their advantages.

The Case For Turbocharged 4-

Cylinder Engines

The biggest benefit of utilizing a turbocharged 4-cylinder

engine is:
1. The ability to generate power comparable a V-6
with the efficiency of a 4-cylinder.
2. Turbo-4 engines operate much like their naturally
aspirated 4-cylinder counterparts. While
displacement remains the same, turbocharged
engines have the ability to get a boost in power
when it’s needed.
So when you need to get your car up to highway
speeds or are looking to pass that oversize load
 semi, the turbocharger pushes compressed air to
the cylinders, making more room for fuel. That
increase in fuel creates larger explosions in each
cylinder, allowing you to access more power.

The Case For V-6 Engines (The case

against turbocharged 4-cylinder
Engines)

While turbocharged 4-cylinder engines offer comparable

power and more efficiency than V-6 engines, many
drivers prefer larger displacement models for a few
reasons.
The knocks against turbo engines is:
1. It takes a second for turbochargers to kick in, so
when you tap the accelerator looking for a little
extra juice, there is sometimes a brief hesitation
before you actually access the full power
capabilities.
2. Since turbocharged 4-cylinder engines in
mainstream vehicles are relatively new, many
drivers prefer to stick with V-6 engines over
turbocharged 4-cylinder models simply because
that is what they accustomed to.
The Case Against V-6 Engines
The major knock against V-6 engines is efficiency.
When fuel flows through six cylinders instead of four,
fuel burns more quickly, which negatively impacts fuel
efficiency. While you might see faster 0-60 times, you’ll
also notice lower mpg ratings.

Forefront Players in India

1. Tata Motors, is said to be working on reducing the
engine size for its diesel vehicles, in the wake of
sales restrictions in this regard imposed for the
Delhi-National Capital Region.
The company is looking to downsize engines to
below 2,000cc (Two litres) for its models from its
sports and utility vehicle portfolio, to be able to
resume sales in these areas. Asked if Tata would
be looking at downsizing its engines, a
spokesperson from Tata said, "We are working on it
because it is the right this for us to consider. We
cannot say when it is going to come about but we
are certainly getting ready to deal with that."
Downsizing of technology is not new to Tata
Motors, maker of the Nano, Indica and Safari
models. The company also has developed a one-
litre diesel engine and a 1.2-litre petrol engine for its
yet to be launch model. "If you look at all our engine
strategy recently, we have exploited downsizing
technology quite strongly. Our new gasoline engine,
1.2 litre, is from downsizing of technology." said
spokesperson from Tata Motors.

2. Hit by ban of registration of diesel SUVs and cars

with engines above 2,000cc in Delhi-NCR,
 homegrown auto major M&M launched a 1.99 litre
version of its mHawk engine series. "This engine
would power the New Generation Scorpio as well
as the New Age XUV500. It would be available for
customers within the Delhi and NCR Region to
begin with," M&M said in a statement.
Mahindra & Mahindra President and Chief
Executive, Auto Division Pravin Shah said: "This
new engine, the development of which started in
August 2014, is now ready for launch on both the
New Generation Scorpio and the New Age
XUV500." Previously, these two vehicles were
powered by 2.2 litre mHawk engines. The new 1.99
litre engine will power the new generation Scorpio
and will deliver 120 HP while for the new XUV500, it
will deliver 140 HP, the company said.

3. Collaboration between Mercedes-Benz and

Renault-Nissan has been working on some new
gasoline four-cylinder engines. However, rather
than developing a more powerful engine, they seem
to have come up with 1.2- and 1.4-litre engines
instead. The new 1.2- and 1.4-litre units will benefit
from direct injection, and will be a standard in the
next generation base variants of the A-Class and B-
Class lineups, according to reports from leading
Auto Magazine in India. There are currently eight
cars lined up for Mercedes’ compact models for
2018 including: the A-Class hatchback, A-Class
Sedan, CLA, CLA Shooting Brake, B-Class, GLA, a
rumoured GLB, and an unknown model that has yet
to be announced by the company.
 The new four-cylinder units, which currently go
under the codename M282, are being
engineered exclusively for transverse applications.
Therefore, these engines will not be available for
use in larger Mercedes-Benz models. These new
units will be joined by an updated version of the
“M274” which will soon be given a codename that is
“M260”. The M260 will be bigger and is going to be
available in two versions: 1.6- and 2.0-litre units.
Meanwhile, the 381 horsepower (280 kilowatts) and
350 pound-feet (475 Newton-metres) of torque
M133 that currently houses in the “45” models will
be replaced by the upgraded 2.0-litre unit - which
will now serve as a foundation for the range topping
models of the following models: A45, CLA45, and
GLA45. The 2.0 litre engine can produce a total of
400 horsepower.

Challenges in Downsizing
 High investments in new technologies
 Large investments in sophisticated production machines
 New technology adoption
 Appropriate software to manage diverse production
 Revamping production processes.
 Sourcing alternate materials
 Continuous skill development
 Consequently higher wages for workforce
 Reducing highly skilled workforce attrition
 Eco-friendly production facilities
 Zero hazardous effluent discharge
 Ensuring zero component recall
 Lack of documented testing and certification standards
 Reduced turnaround time for changes
 End-user acceptance
 Lowering costs
 Maintaining profitability
 Managing growth
 Managing administrative issues

 Better fuel economy

 Lower life cycle costs
 Highly efficient burning of fuel
 Reduced carbon footprint
 Higher power-to-weight ratio
 Better power response
 Reduction in unproductive weight
 Preservation of natural resources
 Accommodate hybrid and emission control units
 Increase in passenger space
 Provides options for better styling of vehicles
Downsizing
You try to reduce engine size while maintaining your
peak torque and power
This is usually accompanied by a
reduced engine speed for peak torque and power (down
speeding)
Simply we can say that it means to try and match your
current engines power and torque with a smaller engine.

Ford Mondeo 3.0L V6 Duratec engine

Engine – gasoline
Power – 179 Kw
Torque – 298Nm

After downsizing

Ford Mondeo 2.0L Ecoboost I4

33% smaller in size
Turbocharged (more air cycled through ,which gives a
first order effect on the torque.)
This even includes a much better effect on torque.
Much better fuel injection system is used.
Much higher fuel pressure with better spray
atomisation due to smaller/better designed injector
nozzles.

Power- 205 Kw
Torque – 380 Nm
16% increased fuel economy
 FORD MONDEO
CONFIGURATION - 60° V6
DISPLACEMENT – 2967CC
CYLINDER BORE – 89.0mm
PISTON STROKE – 79.5 mm
CYLINDER BLOCK ALLOY – ALUMINIUM
CYLINDER HEAD ALLOY - ALUMINIUM
VALVE TRAIN – DOHC
COMPRESSION RATIO – 10.01

COMBUSTION

FUEL SYSTEM - SEQUENTIAL MULTI PORT FUEL

INJECTION
FUEL TYPE – GASOLINE
OIL SYSTEM – WET SUMP
COOLING SYSTEM – WATER COOLED

CHRONOGRAPHY
PREDECESSOR – FORD VULCAN
 MAZDA K. SERIES

SUCCESSOR – FORD CYCLONE ENGINE

FORD MONDEO 3.0 V6 2967 CC ENGINE

POWER – 222 BHP

TOP SPEED – 155 MPH
0-60 MPH – 7.4sec
TORQUE – 280 Nm
CO² EMISSION – 249g/Kg
EURO EMISSION STANDARD – 4
MILES PER TANK – 344 Miles

ENGINE
ENGINE SIZE – 2967 CC
CYLINDERS – 6
VALVES – 24
FUEL TYPE – PETROL
TRANSMISSION – MANUAL
GEARBOX – 6 SPEED
DRIVETRAIN – FRONT WHEEL DRIVE
FORD MONDEO 2.0 ECOBOOST

BODY STYLE – 5 DOOR HATCH BACK WITH 4/5

SEATS
HOW LONG – 4871 mm
HOW HEAVY – 1564 Kg
ENGINE SIZE – 2L , 1999 cm³
NUMBER OF CYLINDERS - 4, STRAIGHT
TORQUE – 345Nm / 254 ft.lb
0-100 KM/H IN 7.95
TOP SPEED – 240KM/H ; 149m/h
HOW ECONOMIC
10.2/5.6/7.31/100 KM URBAN/EXTRA
URBAN/COMBINED
CO2 EMISSION – 169.0 G/Km
FUEL TANK CAPACITY – 62.5 L
ENGINE TYPE – TURBO CHARGED PETROL
CAPACITY – 2L 1999 CC
VALVE GEAR – DOUBLE OVERHEAD CAMSHAFT
4 VALVES PER CYLINDER
16 VALVES IN TOTAL
MAX POWER OUTPUT 240 PS (237 bhp) (177 Kw)
SPECIFIC OUTPUT – 118.bhp/L
1.94 bhp
MAXIMUM TORQUE – 345 Nm (254 ft.lb ) (35.2Km)
SPECIFIC TORQUE – 172.59 Nm/L
2.09ft.lb
ENGINE CONSTRUCTION – ALUMINIUM HEAD;CAST
ALUMINIUM BLOCK
SUMP – WET SUMPED
COMPRESSION RATIO – 10:1
FUEL SYSTEM –BOSCH MED17 DIRECT PETROL
INJECTION
BMEP (BRAKE MEAN EFFECTIVE PRESSURE)
CRANKSHAFT BEARING – 5